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Introduction:
Neoplasm is a medical term that refers to a new growth of cells. Whereas "neo" means new and "plasm" refers to cells, the word neoplasm refers to abnormal overgrowth of cells rather than healthy new cell growth. It is often used interchangeably with words such as tumor and cancer. The main use of the term neoplasm is in medical statistics that categorize deaths or other events, in which case neoplasm is typically the category that includes cancer statistics. A "benign neoplasm" usually refers to a benign tumor (non-cancerous), whereas a "malignant neoplasm" usually refers to a cancerous tumor.

Causes, incidence, and risk factors
In general, tumors occur when cells divide excessively in the body. Typically, cell division is strictly controlled. New cells are created to replace older ones or to perform new functions. Cells that are damaged or no longer needed die to make room for healthy replacements.
If the balance of cell division and death is disturbed, a tumor may form.
Problems with the body's immune system can lead to tumors. Tobacco causes more deaths from cancer than any other environmental substance. Other causes include:
• Benzene and other chemicals and toxins
• Drinking too much alcohol
• Environmental toxins, such as certain poisonous mushrooms and a type of poison that can grow on peanut plants (aflatoxins)
• Excessive sunlight exposure
• Genetic problems
• Obesity
• Radiation
• Viruses
Types of tumors known to be caused by viruses are:

• Cervical cancer (human papillomavirus)
• Hepatocellular carcinoma (hepatitis B virus)
Some tumors are more common in one gender than the other. Some are more common among children or the elderly. Others are related to diet, environment, and family history.

Symptoms
Symptoms depend on the type and location of the tumor. For example, lung tumors may cause coughing, shortness of breath, or chest pain. Tumors of the colon can cause weight loss, diarrhea, constipation, iron deficiency anemia, and blood in the stool.
Some tumors may not cause any symptoms. In certain tumors, such as pancreatic cancer, symptoms often do not start until the disease has reached an advanced stage.
The following symptoms occur with most tumors:
• Chills
• Fatigue
• Fever
• Loss of appetite
• Malaise
• Night sweats
• Weight loss

Signs and tests
Like the symptoms, the signs of tumors vary based on their site and type. Some tumors are obvious, such as skin cancer. However, most cancers cannot be seen during an exam because they are deep inside the body.
When a tumor is found, a biopsy is performed to determine if the tumor is noncancerous (benign) or cancerous (malignant). Depending on the location of the tumor, the biopsy may be a simple procedure or a serious operation.
Most patients with tumors have CT or MRI scans to determine the exact location of the tumor and how far it has spread. More recently, positron emission tomography (PET) scans have been used to find certain tumor types

Other tests include:
• Biopsy of the tumor
• Blood tests (to look for chemicals such as tumor markers)
• Bone marrow biopsy (most often for lymphoma or leukemia)
• Chest x-ray
• Complete blood count (CBC)
Treatment
Treatment varies based on:
• The type of tumor
• Whether it is noncancerous or cancerous
• Its location
If the tumor is benign (meaning it has no potential to spread) and is located in a "safe" area where it will not cause symptoms or affect the function of the organ, sometimes no treatment is needed.
Sometimes benign tumors may be removed for cosmetic reasons, however. Benign tumors of the brain may be removed because of their location or harmful effect on the surrounding normal brain tissue.
If a tumor is cancerous, possible treatments include:
• Chemotherapy
• Radiation
• Surgery
• A combination of these methods
If the cancer is in one location, the goal of treatment is usually to remove the tumor with surgery. If the tumor has spread to local lymph nodes only, sometimes these can also be removed. If all of the cancer cannot be removed with surgery, the options for treatment include radiation and chemotherapy, or both. Some patients need a combination of surgery, radiation, and chemotherapy.
Lymphoma (cancer of the lymph glands) is rarely treated with surgery. Chemotherapy and radiation therapy are most often used for treating lymphoma.

Expectations (prognosis)
The outlook varies greatly for different types of tumors. If the tumor is benign, the outlook is generally very good. However, there are some instances where a benign tumor can cause significant problems, such as in the brain.
If the tumor is malignant, the outcome depends on the type and stage of the tumor at diagnosis. Some cancers can be cured. Some that are not curable can still be treated, and patients can live for many years with the cancer. Still other tumors are quickly life-threatening.

Complications
Complications can occur if a tumor is located in a region of the body where it affects the function of the normal organ. If the tumor is malignant, it can also cause complications if it spreads (metastasizes).

Prevention
You can reduce the risk of cancerous (malignant) tumors by:
• Eating a healthy diet
• Exercising regularly
• Limiting alcohol
• Maintaining a healthy weight
• Minimizing exposure to radiation and toxic chemicals
• Not smoking or chewing tobacco
• Reducing sun exposure, especially if you burn easily

 


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