Cancer

Definition

In this discussion we are talking about a lesion with some substance which may be ulcerated or have a palpable component. We are specifically excluding keratoses and other small surface rough patches which may be the precursors of skin cancer.

Use fingers to stretch lesion. Makes it easier to diagnose a BCC

Diagnosis

This is mostly clinical, by observation of the appearance and features of the lesion. Seeing a lot of these and submitting all lesions for histology will increase the accuracy of diagnosis. There are no tests that can compete with experience. Use of magnifying aid is recommended.

Biopsy is mainly used in the difficult cases where the result may alter the treatment. There is little point in doing a biopsy and then submitting the lesion for an excision. The only biopsy that is worth doing is an excision biopsy but this must be done in such a way that the lesion is adequately treated no matter what is the histological diagnosis. There is no place for biopsy of a lesions suspected of being a malignant melanoma. The false negative biopsy is the main danger as it may lead to incorrect advice or treatment.
Treatment

Cautery and Cryotherapy are fine for keratoses but have no place in the established lesion. The biopsy combined with this technique will confirm the diagnosis but there will be no specimen for the pathologist and will not be able to tell the operator whether he has completely excised the lesion. Another consideration is the cosmetic result, this is usually a ghastly white patch which after repeated treatment becomes resented by patients. If we are going to have patients present willingly with early lesions than we must also pay attention to the appearance of our work

Surgical excision with a scalpel will give a better looking result in the vast majority of locations. It also guarantees a specimen for the pathologist to comment on. Occasionally there will be an inadequate excision but this is preferable to not even knowing if the cautery was inadequate. Any one operator’s rate of inadequate excisions should decrease with experience and plastic surgeons tend to be more generous with their excision as they have the confidence of knowing techniques of repair to fit any case.
Recurrence

There are published papers comparing the results of the various treatment modalities, surgery has by far the lowest rate of all. This is an area where quality assurance has a place, A surgeon should look at his own rate and review the cases which were inadequately excised. With experience and knowledge of the disease this can be lowered to almost zero. There will always be the multifocal BCC which is difficult to judge in width.
Results

Can be looked at in several ways. A low recurrence rate is one of the most important goals but we must also remember the appearance of the patient. As most of these lesions are on the face or some exposed part of the body it is imperative that we pay attention and explain to the patient what kind of scars they are likely to get. There too many patients who are disfigured by repeated cryotherapy. This is not to say that the treatment should be compromised to make it look good. A neat surgical scar, particularly in the elderly blends in very well with their wrinkles and is the preferred treatment.
The neglected lesions

We all see the occasional case where the patient has ignored an obviously enlarging lesion but for whatever reason has not sought treatment. The most worrying case is where they had a biopsy and told it was nothing. The only treatment for these is surgical excision and histologic examination to judge the clearance. Attention to appearance and public education are the keys to earlier detection. Radiotherapy

There are some situations where this is the preferred form of treatment. An elderly and frail person will do better with radiotherapy than if they have extensive surgery. Do not forget that radiotherapy usually means several visits and this in itself may be a problem. It is also a costly form of treatment. There are areas such as eyelids, nose, ear, lower leg which are not suitable for radiotherapy.
Moh’s technique

This is an attempt to prevent recurrences by having histological control during the treatment process. In theory it is very inviting but is extremely time consuming and expensive. It has a place for some difficult lesions on the face but not as a routine method. Frozen sections during an operation are little different from this technique and are widely utilised by surgeons. The key is to recognise the difficult lesion, this takes experience.
Cost of treatment

In this era of everything being dominated by budgets and economic constraints, surgery is still cost effective. A surgeon’s fee is no larger than a dermatologists when you compare the cost of two visits vs many. The cost of hospitals can be significant but dermatologists do not provide their equipment for nothing either. Pathology costs should be similar.
The ideal setup

In a public hospital it should be a combined clinic where a dermatologist and a surgeon see patients together or at least discuss most cases. In private practice this is difficult to organise, a good working relationship with a dermatologist is desirable. This leads to a flow of cases both ways and benefiting the patients.
Summary

It is important to provide good treatment for a large population with skin cancers. Surgery is the preferred form of treatment in most cases

Thyroid Cancers

The 4 general types of thyroid cancer are papillary, follicular, medullary, and anaplastic. Papillary and follicular carcinoma together are called differentiated thyroid cancer because of their histologic resemblance to normal thyroid tissue and because differentiated function (eg, thyroglobulin secretion) is preserved. Most thyroid cancers present as asymptomatic nodules. Rarely, lymph node, lung, or bone metastases cause the presenting symptoms of small thyroid cancers. Diagnosis is often by fine-needle aspiration biopsy but may involve other tests. Except for anaplastic and metastatic medullary carcinoma, most thyroid cancers are not highly malignant and are seldom fatal. Treatment is surgical removal, usually followed by ablation of residual tissue with radioactive iodine.

Papillary Carcinoma

Papillary carcinoma accounts for 70 to 80% of all thyroid cancers. The female-to-male ratio is 3:1. It may be familial in up to 5% of patients. Most patients present between ages 30 and 60. The tumor is often more aggressive in elderly patients. Many papillary carcinomas contain follicular elements.

The tumor spreads via lymphatics to regional lymph nodes in 1/3 of patients and may metastasize to the lungs. Patients < 45 yr with small tumors confined to the thyroid have an excellent prognosis.

Treatment

Treatment for encapsulated tumors < 1.5 cm localized to one lobe is usually near-total thyroidectomy, although some experts recommend only lobectomy and isthmectomy; surgery is almost always curative. Thyroid hormone in thyroid-stimulating hormone (TSH)–suppressive doses is given to minimize chances of regrowth and cause regression of any microscopic remnants of papillary carcinoma.

Tumors > 4 cm or that are diffusely spreading require total or near-total thyroidectomy with postoperative radioiodine ablation of residual thyroid tissue with appropriately large doses of 131I administered when the patient is hypothyroid or after recombinant TSH injections. Treatment may be repeated q 6 to 12 mo to ablate any remaining thyroid tissue. TSH-suppressive doses of l-thyroxine are given after treatment, and serum thyroglobulin levels help detect recurrent or persistent disease. About 20 to 30% of patients, mainly older patients, have recurrent or persistent disease.

Follicular Carcinoma

Follicular carcinoma, including the Hurthle cell variant, accounts for about 15% of thyroid cancers. It is more common among older patients and in regions of iodine deficiency. It is more malignant than papillary carcinoma, spreading hematogenously with distant metastases.

Treatment requires near-total thyroidectomy with postoperative radioiodine ablation of residual thyroid tissue as in treatment for papillary carcinoma. Metastases are more responsive to radioiodine therapy than are those of papillary carcinoma. TSH-suppressive doses of l-thyroxine are given after treatment. Serum thyroglobulin should be monitored to detect recurrent or persistent disease.

Medullary Carcinoma

Medullary (solid) carcinoma constitutes about 3% of thyroid cancers and is composed of parafollicular cells (C cells) that produce calcitonin. It may be sporadic (usually unilateral); however, it is often familial, caused by a mutation of the ret proto-oncogene. The familial form may occur in isolation or as a component of multiple endocrine neoplasia (MEN) syndromes types IIA and IIB (see Multiple Endocrine Neoplasia (MEN) Syndromes: Multiple Endocrine Neoplasia, Type 2A (MEN 2A); see Multiple Endocrine Neoplasia (MEN) Syndromes: Multiple Endocrine Neoplasia, Type 2B (MEN 2B)). Although calcitonin can lower serum Ca and phosphate, serum Ca is normal because the high level of calcitonin ultimately down-regulates its receptors. Characteristic amyloid deposits that stain with Congo red are also present.

Metastases spread via the lymphatic system to cervical and mediastinal nodes and sometimes to liver, lungs, and bone.

Symptoms and Signs

Patients typically present with an asymptomatic thyroid nodule, although many cases are now diagnosed during routine screening of affected kindreds with MEN-IIA or IIB before a palpable tumor develops.

Medullary carcinoma may have a dramatic biochemical presentation when associated with ectopic production of other hormones or peptides (eg, ACTH, vasoactive intestinal polypeptide, prostaglandins, kallikreins, serotonin).

Diagnosis

The best test is measurement of serum calcitonin, which is greatly elevated. A challenge with Ca (15 mg/kg IV over 4 h) provokes excessive secretion of calcitonin. X-rays may show a dense, homogenous, conglomerate calcification.

All patients with medullary carcinoma should have genetic testing; relatives of those with mutations should have genetic testing and measurement of basal and stimulated calcitonin levels.

Treatment

Total thyroidectomy is indicated even if bilateral involvement is not obvious. Lymph nodes are also dissected. If hyperparathyroidism is present, removal of hyperplastic or adenomatous parathyroids is required. Pheochromocytoma, if present, is usually bilateral. Pheochromocytomas should be identified and removed before thyroidectomy because of the danger of provoking hypertensive crisis during the operation. Long-term survival is common in patients with medullary carcinoma and MEN-IIA; > 2/3 of affected patients are alive at 10 yr. Medullary carcinoma of the sporadic type has a worse prognosis.

Relatives with an elevated calcitonin level without a palpable thyroid abnormality should undergo thyroidectomy, because there is a greater chance of cure at this stage. Some experts recommend surgery in relatives who have normal basal and stimulated serum calcitonin levels but who have the ret proto-oncogene mutation.

Anaplastic Carcinoma

Anaplastic carcinoma is an undifferentiated cancer that accounts for about 2% of thyroid cancers. It occurs mostly in elderly patients and slightly more often in women. The tumor is characterized by rapid, painful enlargement. Rapid enlargement of the thyroid may also suggest thyroid lymphoma, particularly if found in association with Hashimoto’s thyroiditis.

No effective therapy exists, and the disease is generally fatal. About 80% of patients die within 1 yr of diagnosis. In a few patients with smaller tumors, thyroidectomy followed by external radiation has been curative. Chemotherapy is mainly experimental.

Radiation-Induced Thyroid Cancer

Thyroid tumors develop in people exposed to large amounts of environmental thyroid radiation, as occurs from atomic bomb blasts, nuclear reactor accidents, or incidental thyroid irradiation due to radiation therapy. Tumors may be detected 10 yr after exposure, but risk remains increased for 30 to 40 yr. Such tumors are usually benign; however, about 10% are papillary thyroid carcinoma. The tumors are frequently multicentric or diffuse.

Patients who had thyroid irradiation should undergo yearly thyroid palpation, ultrasonography, and measurement of thyroid autoantibodies (to exclude Hashimoto’s thyroiditis). A thyroid scan does not always reflect areas of involvement.

If ultrasonography reveals a nodule, fine-needle aspiration biopsy should be done. In the absence of suspicious or malignant lesions, many physicians recommend lifelong TSH-lowering doses of thyroid hormone to suppress thyroid function and thyrotropin secretion and possibly decrease the chance of developing a thyroid tumor.

Surgery is required if fine-needle aspiration biopsy suggests cancer. Near-total or total thyroidectomy is the treatment of choice, to be followed by radioiodine ablation of any residual thyroid tissue if a cancer is found (depending on the size, histology, and invasiveness)

A cancer is a group of abnormal cells, known as a tumor, that grows uncontrollably. Cancerous tumors invade and destroy surrounding tissue. Not all tumors are cancerous. Benign tumors, which are not cancerous, do not invade and destroy tissue. However, a benign tumor may grow very large. Cancerous tumors may shed cancer cells that spread to other parts of the body. This is called a metastasis. Benign tumors do not spread in this way.
What is going on in the body?

A chromosome is genetic material within the nucleus of a cell. Chromosomes provide the so-called blueprints that direct normal cell function. The nucleus that houses the chromosomes is the control center for the cell. The nucleus of a normal cell, such as a muscle cell, controls its activity as part of a larger tissue, a muscle. The cell will then act in concert with other cells of that muscle to expand and contract, causing motion. Damage to the nucleus prevents the cell from behaving normally.

Cancer occurs when the damage causes changes that make the cell grow and divide wildly. When a cell becomes cancerous, over time a tumor forms from these abnormal cells. Because the tumor is made up of defective cells, it cannot function as it should. The body suffers in two ways:
from both the loss of the normal function of that tissue, and
from the damage to other tissues

A cancer is named by the type of organ tissue from which it developed. For example, breast cancer will always be called breast cancer, even if it spreads to other body parts. The type of tissue within an organ that underwent the cancerous change also further identifies a cancer. For example, lung cancer is grouped into several groups depending on exactly what kind of lung tissue was affected. A cancerous tumor does not grow any faster than the kind of tissue from which it started. But it does keep growing and multiplying uncontrollably. Healthy tissue does not grow constantly.

In the early stages of any cancer, you may not be able to see much of an effect on the body. But cancer cells can break off from the main tumor and travel through your blood stream to other parts of your body. These cancer cells may then form new tumors, known as metastases. As the cancer grows and spreads, or metastasizes, the person will likely begin to weaken. Cancer makes it hard for your body to function normally.

In the advanced stages of cancer, symptoms such as weight loss, weakness, and fatigue are common. At the same time, new cancerous tumors that spread to other parts of the body may cause other organs to fail. If not successfully treated, the cancer will destroy the functioning of vital body systems. This can lead to death.

These vital body functions include:
breathing when the lungs are involved
regulation of body functions when the brain is involved
waste removal when the liver or kidneys are involved

Most cancers occur in people older than age 55. This may be because cells become more vulnerable to damage after years of use. It is possible for children to have cancer, but this is rare. More men than women have cancer. The most common cause of cancer death in men and women is lung cancer.
What are the causes and risks of the disease?

For cancer to occur, something must damage the nucleus of the cell. Some people are born with a tendency for cancer. Their cells may be more vulnerable to the kind of damage that leads to cancer. For others, the damage occurs after years of exposure to substances that can cause cancer. Tobacco from any source is very dangerous. Certain chemicals, unprotected sun exposure, and radiation can all cause serious damage.

Symptoms & Signs
What are the signs and symptoms of the disease?

The specific symptoms of cancer depend upon where the cancer is located. In some cases, a tumor can stay hidden for years because it causes no damage to tissues that would result in an observable symptom. Examples of cancers that may stay hidden for a long time include the following.
A breast lump must grow to the size of the fingertip to be felt.
A colon cancer may be undetected until it erodes into a blood vessel in the colon. Blood will then leak into the stool.

Many times the symptoms of cancer are vague or can be mistaken for other diseases. The non-specific symptoms of cancer can include:
abnormal discharges
fatigue
persistent cough
unexplained weight loss
unusual lumps or growth

Any of these symptoms should prompt you to see your doctor.

Diagnosis & Tests
How is the disease diagnosed?

If cancer is suspected, it must be confirmed by examining the abnormal tissue in the pathology laboratory. This can mean removing a piece of the tissue with a biopsy. Sometimes the whole tumor is removed, which is known as a resection. Additional studies such as special X-rays and blood tests may be done to measure the extent of the disease. This is known as staging the disease.
Prevention & Expectations
What can be done to prevent the disease?

Cancer found while it is still in the early stages is much easier to treat. You can take the following cancer prevention steps.
Avoid all tobacco products to help prevent the most common cause of death from cancer, lung cancer.
Limit sun exposure, especially in children, to help prevent melanoma.
Eat a diet high in fiber to help reduce your risk for cancer of the colon.
Avoid drinking alcohol.
Get regular medical checkups.
Learn how to do a testicular self-exam, if you are a man .
Learn how to do a breast self-exam, if you are a woman.

Since some cancers cannot be prevented, early detection and diagnosis are key tools in improving cancer survival.
What are the long-term effects of the disease?

Half of all people with cancer are cured with treatment. And luckily, cancer can often be successfully controlled even if it is not cured. But, if cancer is not successfully treated, it will be fatal.
What are the risks to others?

There is no risk to others from people with cancer. Cancer cannot be spread from one person to another.

Treatment & Monitoring
What are the treatments for the disease?

Curing or controlling cancer may require that you use many forms of treatment. Some of these are listed below.

Surgery. The first treatment for many cancers is surgery to remove the solid tumor. If the tumor is small enough, the cancer can often be cured this way. This is a local treatment, and it is not effective for cancers that have spread to other parts of the body. Leukemia and lymphoma are not localized because they affect the blood system. So they also cannot be treated by surgery.

Chemotherapy.This is a type of treatment that involves the use of medicines. Your doctor gives these medicines to you either by mouth or directly into a vein. Next, they travel through your body via your blood. This is called a systemic treatment because the medicines may affect your whole body. This approach has been used to cure or control cancers such as leukemia that are more widespread than local. Or it may be used for cancers that were local, but have now spread to other parts of your body. Just as some infections do not respond to antibiotics, not all cancers respond to chemotherapy.

Radiation.In this local treatment, focused energy waves of radiation are directed at tumors. This can kill or slow the growth of many cancers. Cancers that are localized and sensitive to radiation may even be cured by this treatment. Examples of cancers that can be cured by radiation are Hodgkin disease and cancer of the voice box, or larynx.

Immunotherapy.This form of treatment uses the body’s immune response to kill or control the cancer. It has only limited effectiveness. It is useful only for certain cancers. Many cancers are too advanced at diagnosis to be affected by this approach alone.

In many cases, a combination of treatments has proven most effective.
What are the side effects of the treatments?

The side effects depend on the type of treatment and the extent of treatment.
Extensive surgery or intensive chemotherapy may require a long recovery period. Current management of side effects make it possible for many people to maintain normal activities throughout the treatment period.
Localized therapy may have minimal side effects.
In advanced cancer, treatment is aimed at improving quality of life and decreasing symptoms of the cancer.

What happens after treatment for the disease?

After treatment, the person with cancer will be watched closely to determine the effectiveness of treatment. People who are cured of their cancers should be able to resume normal lives. If the treatment is not effective, other therapy may be tried. If all therapy has proved ineffective, every effort will be made to assure comfort during the final stages.

How is the disease monitored?

Each cancer is followed according to type and how it was diagnosed. Leukemia is followed by examining blood samples. Lung cancer is followed with special X-rays of the chest. Progression of an advancing cancer may be monitored through X-rays, depending where the cancer has spread or is suspected to have spread. Always report any new or worsening symptoms to your doctor

A cancer is a group of abnormal cells, known as a tumor, that grows uncontrollably. Cancerous tumors invade and destroy surrounding tissue. Not all tumors are cancerous. Benign tumors, which are not cancerous, do not invade and destroy tissue. However, a benign tumor may grow very large. Cancerous tumors may shed cancer cells that spread to other parts of the body. This is called a metastasis. Benign tumors do not spread in this way.
What is going on in the body?

A chromosome is genetic material within the nucleus of a cell. Chromosomes provide the so-called blueprints that direct normal cell function. The nucleus that houses the chromosomes is the control center for the cell. The nucleus of a normal cell, such as a muscle cell, controls its activity as part of a larger tissue, a muscle. The cell will then act in concert with other cells of that muscle to expand and contract, causing motion. Damage to the nucleus prevents the cell from behaving normally.

Cancer occurs when the damage causes changes that make the cell grow and divide wildly. When a cell becomes cancerous, over time a tumor forms from these abnormal cells. Because the tumor is made up of defective cells, it cannot function as it should. The body suffers in two ways:
from both the loss of the normal function of that tissue, and
from the damage to other tissues

A cancer is named by the type of organ tissue from which it developed. For example, breast cancer will always be called breast cancer, even if it spreads to other body parts. The type of tissue within an organ that underwent the cancerous change also further identifies a cancer. For example, lung cancer is grouped into several groups depending on exactly what kind of lung tissue was affected. A cancerous tumor does not grow any faster than the kind of tissue from which it started. But it does keep growing and multiplying uncontrollably. Healthy tissue does not grow constantly.

In the early stages of any cancer, you may not be able to see much of an effect on the body. But cancer cells can break off from the main tumor and travel through your blood stream to other parts of your body. These cancer cells may then form new tumors, known as metastases. As the cancer grows and spreads, or metastasizes, the person will likely begin to weaken. Cancer makes it hard for your body to function normally.

In the advanced stages of cancer, symptoms such as weight loss, weakness, and fatigue are common. At the same time, new cancerous tumors that spread to other parts of the body may cause other organs to fail. If not successfully treated, the cancer will destroy the functioning of vital body systems. This can lead to death.

These vital body functions include:
breathing when the lungs are involved
regulation of body functions when the brain is involved
waste removal when the liver or kidneys are involved

Most cancers occur in people older than age 55. This may be because cells become more vulnerable to damage after years of use. It is possible for children to have cancer, but this is rare. More men than women have cancer. The most common cause of cancer death in men and women is lung cancer.
What are the causes and risks of the disease?

For cancer to occur, something must damage the nucleus of the cell. Some people are born with a tendency for cancer. Their cells may be more vulnerable to the kind of damage that leads to cancer. For others, the damage occurs after years of exposure to substances that can cause cancer. Tobacco from any source is very dangerous. Certain chemicals, unprotected sun exposure, and radiation can all cause serious damage.
Symptoms & Signs
What are the signs and symptoms of the disease?

The specific symptoms of cancer depend upon where the cancer is located. In some cases, a tumor can stay hidden for years because it causes no damage to tissues that would result in an observable symptom. Examples of cancers that may stay hidden for a long time include the following.
A breast lump must grow to the size of the fingertip to be felt.
A colon cancer may be undetected until it erodes into a blood vessel in the colon. Blood will then leak into the stool.

Many times the symptoms of cancer are vague or can be mistaken for other diseases. The non-specific symptoms of cancer can include:
abnormal discharges
fatigue
persistent cough
unexplained weight loss
unusual lumps or growth

Any of these symptoms should prompt you to see your doctor.
Diagnosis & Tests
How is the disease diagnosed?

If cancer is suspected, it must be confirmed by examining the abnormal tissue in the pathology laboratory. This can mean removing a piece of the tissue with a biopsy. Sometimes the whole tumor is removed, which is known as a resection. Additional studies such as special X-rays and blood tests may be done to measure the extent of the disease. This is known as staging the disease.
Prevention & Expectations
What can be done to prevent the disease?

Cancer found while it is still in the early stages is much easier to treat. You can take the following cancer prevention steps.
Avoid all tobacco products to help prevent the most common cause of death from cancer, lung cancer.
Limit sun exposure, especially in children, to help prevent melanoma.
Eat a diet high in fiber to help reduce your risk for cancer of the colon.
Avoid drinking alcohol.
Get regular medical checkups.
Learn how to do a testicular self-exam, if you are a man .
Learn how to do a breast self-exam, if you are a woman.

Since some cancers cannot be prevented, early detection and diagnosis are key tools in improving cancer survival.
What are the long-term effects of the disease?

Half of all people with cancer are cured with treatment. And luckily, cancer can often be successfully controlled even if it is not cured. But, if cancer is not successfully treated, it will be fatal.
What are the risks to others?

There is no risk to others from people with cancer. Cancer cannot be spread from one person to another.
Treatment & Monitoring
What are the treatments for the disease?

Curing or controlling cancer may require that you use many forms of treatment. Some of these are listed below.

Surgery. The first treatment for many cancers is surgery to remove the solid tumor. If the tumor is small enough, the cancer can often be cured this way. This is a local treatment, and it is not effective for cancers that have spread to other parts of the body. Leukemia and lymphoma are not localized because they affect the blood system. So they also cannot be treated by surgery.

Chemotherapy.This is a type of treatment that involves the use of medicines. Your doctor gives these medicines to you either by mouth or directly into a vein. Next, they travel through your body via your blood. This is called a systemic treatment because the medicines may affect your whole body. This approach has been used to cure or control cancers such as leukemia that are more widespread than local. Or it may be used for cancers that were local, but have now spread to other parts of your body. Just as some infections do not respond to antibiotics, not all cancers respond to chemotherapy.

Radiation.In this local treatment, focused energy waves of radiation are directed at tumors. This can kill or slow the growth of many cancers. Cancers that are localized and sensitive to radiation may even be cured by this treatment. Examples of cancers that can be cured by radiation are Hodgkin disease and cancer of the voice box, or larynx.

Immunotherapy.This form of treatment uses the body’s immune response to kill or control the cancer. It has only limited effectiveness. It is useful only for certain cancers. Many cancers are too advanced at diagnosis to be affected by this approach alone.

In many cases, a combination of treatments has proven most effective.
What are the side effects of the treatments?

The side effects depend on the type of treatment and the extent of treatment.
Extensive surgery or intensive chemotherapy may require a long recovery period. Current management of side effects make it possible for many people to maintain normal activities throughout the treatment period.
Localized therapy may have minimal side effects.
In advanced cancer, treatment is aimed at improving quality of life and decreasing symptoms of the cancer.

What happens after treatment for the disease?

After treatment, the person with cancer will be watched closely to determine the effectiveness of treatment. People who are cured of their cancers should be able to resume normal lives. If the treatment is not effective, other therapy may be tried. If all therapy has proved ineffective, every effort will be made to assure comfort during the final stages.
How is the disease monitored?

Each cancer is followed according to type and how it was diagnosed. Leukemia is followed by examining blood samples. Lung cancer is followed with special X-rays of the chest. Progression of an advancing cancer may be monitored through X-rays, depending where the cancer has spread or is suspected to have spread. Always report any new or worsening symptoms to your doctor.
Attribution

A cancer is a group of abnormal cells, known as a tumor, that grows uncontrollably. Cancerous tumors invade and destroy surrounding tissue. Not all tumors are cancerous. Benign tumors, which are not cancerous, do not invade and destroy tissue. However, a benign tumor may grow very large. Cancerous tumors may shed cancer cells that spread to other parts of the body. This is called a metastasis. Benign tumors do not spread in this way.
What is going on in the body?

A chromosome is genetic material within the nucleus of a cell. Chromosomes provide the so-called blueprints that direct normal cell function. The nucleus that houses the chromosomes is the control center for the cell. The nucleus of a normal cell, such as a muscle cell, controls its activity as part of a larger tissue, a muscle. The cell will then act in concert with other cells of that muscle to expand and contract, causing motion. Damage to the nucleus prevents the cell from behaving normally.

Cancer occurs when the damage causes changes that make the cell grow and divide wildly. When a cell becomes cancerous, over time a tumor forms from these abnormal cells. Because the tumor is made up of defective cells, it cannot function as it should. The body suffers in two ways:
from both the loss of the normal function of that tissue, and
from the damage to other tissues

A cancer is named by the type of organ tissue from which it developed. For example, breast cancer will always be called breast cancer, even if it spreads to other body parts. The type of tissue within an organ that underwent the cancerous change also further identifies a cancer. For example, lung cancer is grouped into several groups depending on exactly what kind of lung tissue was affected. A cancerous tumor does not grow any faster than the kind of tissue from which it started. But it does keep growing and multiplying uncontrollably. Healthy tissue does not grow constantly.

In the early stages of any cancer, you may not be able to see much of an effect on the body. But cancer cells can break off from the main tumor and travel through your blood stream to other parts of your body. These cancer cells may then form new tumors, known as metastases. As the cancer grows and spreads, or metastasizes, the person will likely begin to weaken. Cancer makes it hard for your body to function normally.

In the advanced stages of cancer, symptoms such as weight loss, weakness, and fatigue are common. At the same time, new cancerous tumors that spread to other parts of the body may cause other organs to fail. If not successfully treated, the cancer will destroy the functioning of vital body systems. This can lead to death.

These vital body functions include:
breathing when the lungs are involved
regulation of body functions when the brain is involved
waste removal when the liver or kidneys are involved

Most cancers occur in people older than age 55. This may be because cells become more vulnerable to damage after years of use. It is possible for children to have cancer, but this is rare. More men than women have cancer. The most common cause of cancer death in men and women is lung cancer.
What are the causes and risks of the disease?

For cancer to occur, something must damage the nucleus of the cell. Some people are born with a tendency for cancer. Their cells may be more vulnerable to the kind of damage that leads to cancer. For others, the damage occurs after years of exposure to substances that can cause cancer. Tobacco from any source is very dangerous. Certain chemicals, unprotected sun exposure, and radiation can all cause serious damage.
Symptoms & Signs
What are the signs and symptoms of the disease?

The specific symptoms of cancer depend upon where the cancer is located. In some cases, a tumor can stay hidden for years because it causes no damage to tissues that would result in an observable symptom. Examples of cancers that may stay hidden for a long time include the following.
A breast lump must grow to the size of the fingertip to be felt.
A colon cancer may be undetected until it erodes into a blood vessel in the colon. Blood will then leak into the stool.

Many times the symptoms of cancer are vague or can be mistaken for other diseases. The non-specific symptoms of cancer can include:
abnormal discharges
fatigue
persistent cough
unexplained weight loss
unusual lumps or growth

Any of these symptoms should prompt you to see your doctor.
Diagnosis & Tests
How is the disease diagnosed?

If cancer is suspected, it must be confirmed by examining the abnormal tissue in the pathology laboratory. This can mean removing a piece of the tissue with a biopsy. Sometimes the whole tumor is removed, which is known as a resection. Additional studies such as special X-rays and blood tests may be done to measure the extent of the disease. This is known as staging the disease.
Prevention & Expectations
What can be done to prevent the disease?

Cancer found while it is still in the early stages is much easier to treat. You can take the following cancer prevention steps.
Avoid all tobacco products to help prevent the most common cause of death from cancer, lung cancer.
Limit sun exposure, especially in children, to help prevent melanoma.
Eat a diet high in fiber to help reduce your risk for cancer of the colon.
Avoid drinking alcohol.
Get regular medical checkups.
Learn how to do a testicular self-exam, if you are a man .
Learn how to do a breast self-exam, if you are a woman.

Since some cancers cannot be prevented, early detection and diagnosis are key tools in improving cancer survival.
What are the long-term effects of the disease?

Half of all people with cancer are cured with treatment. And luckily, cancer can often be successfully controlled even if it is not cured. But, if cancer is not successfully treated, it will be fatal.
What are the risks to others?

There is no risk to others from people with cancer. Cancer cannot be spread from one person to another.
Treatment & Monitoring
What are the treatments for the disease?

Curing or controlling cancer may require that you use many forms of treatment. Some of these are listed below.

Surgery. The first treatment for many cancers is surgery to remove the solid tumor. If the tumor is small enough, the cancer can often be cured this way. This is a local treatment, and it is not effective for cancers that have spread to other parts of the body. Leukemia and lymphoma are not localized because they affect the blood system. So they also cannot be treated by surgery.

Chemotherapy.This is a type of treatment that involves the use of medicines. Your doctor gives these medicines to you either by mouth or directly into a vein. Next, they travel through your body via your blood. This is called a systemic treatment because the medicines may affect your whole body. This approach has been used to cure or control cancers such as leukemia that are more widespread than local. Or it may be used for cancers that were local, but have now spread to other parts of your body. Just as some infections do not respond to antibiotics, not all cancers respond to chemotherapy.

Radiation.In this local treatment, focused energy waves of radiation are directed at tumors. This can kill or slow the growth of many cancers. Cancers that are localized and sensitive to radiation may even be cured by this treatment. Examples of cancers that can be cured by radiation are Hodgkin disease and cancer of the voice box, or larynx.

Immunotherapy.This form of treatment uses the body’s immune response to kill or control the cancer. It has only limited effectiveness. It is useful only for certain cancers. Many cancers are too advanced at diagnosis to be affected by this approach alone.

In many cases, a combination of treatments has proven most effective.
What are the side effects of the treatments?

The side effects depend on the type of treatment and the extent of treatment.
Extensive surgery or intensive chemotherapy may require a long recovery period. Current management of side effects make it possible for many people to maintain normal activities throughout the treatment period.
Localized therapy may have minimal side effects.
In advanced cancer, treatment is aimed at improving quality of life and decreasing symptoms of the cancer.

What happens after treatment for the disease?

After treatment, the person with cancer will be watched closely to determine the effectiveness of treatment. People who are cured of their cancers should be able to resume normal lives. If the treatment is not effective, other therapy may be tried. If all therapy has proved ineffective, every effort will be made to assure comfort during the final stages.
How is the disease monitored?

Each cancer is followed according to type and how it was diagnosed. Leukemia is followed by examining blood samples. Lung cancer is followed with special X-rays of the chest. Progression of an advancing cancer may be monitored through X-rays, depending where the cancer has spread or is suspected to have spread. Always report any new or worsening symptoms to your doctor

Pancreatic cancer occurs when cells within the pancreas undergo changes that make the cells grow and divide uncontrollably.
What is going on in the body?

The pancreas is a gland located in the middle part of the upper abdomen. Insulin is produced by the pancreas to help the body regulate blood glucose. The pancreas also produces substances to help the body digest food. When a cell in the pancreas becomes cancerous, it grows into a tumor that destroys the tissue around it.

A tumor in the pancreas tends to quickly invade the nearby liver. Eventually, the liver will be affected, and part of it will be destroyed. The cancer can also metastasize, or spread, through the bloodstream to other parts of the body. Pancreatic cancer is usually found late in the disease when it is most likely to be fatal.
What are the causes and risks of the disease?

Cigarette smoking significantly increases a person’s risk for pancreatic cancer. It is not clear if other factors also increase the risk. The influence of alcohol and caffeine on the development of this cancer is uncertain and controversial.
Symptoms & Signs
What are the signs and symptoms of the disease?

Most people do not realize they have pancreatic cancer until it has advanced into the liver. At that time, the person will have symptoms related to the destruction of the liver. Unexplained weight loss is the most common symptom. Other symptoms may include:
jaundice, or yellowing of the skin and eyes
nausea and vomiting
pain in the middle to upper part of the abdomen that may spread to the back

Diagnosis & Tests
How is the disease diagnosed?

Diagnosis of pancreatic cancer begins with a medical history and physical exam. The healthcare provider may order tests, including:
an abdominal CT scan
a biopsy to remove a small piece of tissue for examination
CT scans and specialized X-rays to determine if the cancer has spread

Prevention & Expectations
What can be done to prevent the disease?

Individuals who smoke can lower their risk for pancreatic cancer if they quit smoking. Some studies suggest that people who have had a tonsillectomy or various allergies may be at less risk for pancreatic cancer, but more research is needed.
What are the long-term effects of the disease?

If found early, the cancer can sometimes be controlled for a period of time. However, pancreatic cancer usually causes death. The average survival is 4.1 months.
What are the risks to others?

Pancreatic cancer is not contagious and poses no risk to others.
Treatment & Monitoring
What are the treatments for the disease?

Treatment varies depending upon the extent of the disease. If the disease is localized and the tumor is small, surgical removal of the tumor may offer long-term control of the cancer. Chemotherapy with radiation therapy may be offered once a small tumor is removed. This may be helpful in slowing the return of the tumor.

Most pancreatic cancers are found when the tumors are too large to remove. Large tumors may block the intestines. Surgery may be performed to bypass the blockage and relieve symptoms such as nausea and vomiting. Chemotherapy may be offered to relieve symptoms, such as pain, by shrinking the tumor. Advanced pancreatic cancer is not usually curable.
What are the side effects of the treatments?

Most people treated with surgery generally heal without difficulty. The effects of radiation therapy are temporary and will resolve after completion. During therapy, the person is likely to experience nausea, skin burning, temporarily lowered blood cell counts, and difficulty swallowing. Medicines will help control the nausea.

Chemotherapy given to a person with early-stage disease makes the radiation work better. By itself, the chemotherapy can cause mouth sores, stomach upset, fatigue, hair loss, and increased risk of infections. Radiation may intensify some of the side effects, but this is temporary. Chemotherapy given to treat late-stage cancers is usually well tolerated. It is given to relieve symptoms.
What happens after treatment for the disease?

Pancreatic cancer is likely to progress, even with treatment. As the cancer progresses, treatments can be given to make the person more comfortable.
How is the disease monitored?

Someone with pancreatic cancer will have regular visits with the healthcare provider. CT scans will indicate the progress of the disease. When the liver is damaged by cancer, it will begin to fail. Liver function tests will also indicate how well the liver is functioning. As different interventions are used to bring comfort, the person will be monitored closely. Any new or worsening symptoms should be reported to the healthcare provider

Having a troubled early parent-child relationship together with a severe life event in the past year may potentially be linked to immune responses to the most common skin cancer, basal cell carcinoma (BCC). The study is published in Archives of General Psychiatry.

Background information in the article states that stressful events and resulting negative emotions can trigger a dysfunction in the body's immunity system producing clinically important changes, which impact on BCC, the appearance of the tumor, as well as progression of the disease. Age, childhood sun exposure, a fair skin-type and being male are all risk factors for the first BCC, although the researchers highlight that subsequent tumors cannot reliably related to these risk factors, writing:

"The immune system plays a prominent role in response to BCC tumors because they are immunogenic, unlike many other common cancers that do not show the same responsiveness to the immune system. Psychological stress may play an important role in the tumor environment for this immunogenic tumor and have important implications for subsequent BCC tumors."

Christopher P. Fagundes, Ph.D., from Ohio's State University Medical Center in Columbus and his team evaluated details from 91 patients, 48 men and 43 women aged between 23 to 92 years who all had a previous BCC tumor, such as early parent-child experiences, any recent severe life events, depression and mRNA (messenger RNA) for immune markers that are linked to BCC tumor progression and regression in BCC tumor patients.

Fagundes and his team state:

"Our results show that among BCC patients who experienced a severe stressor in the past year, those who were emotionally maltreated by their mothers or fathers as children were more likely to have poorer immune responses as reflected in lower levels of mRNA for CD25, CD3ε, ICAM-1 and CD68 to their BCC tumors."

The results demonstrated that those with no dramatic life event, i.e. who suffered no emotional maltreatment were not linked to BCC immune responses and neither were depressive symptoms linked to local tumor immune responses.

The researchers concluded: "This is the first study, to our knowledge, to show that troubled early parental experiences, in combination with a severe life event in the past year, predict local immune responses to a BCC tumor. These data complement and expand increasing evidence that the consequences of early parental experiences extend well beyond childhood."