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Colon carcinoma

A Colon carcinoma is a disease in which malignant (cancer) cells form in the tissues of the colon.

The colon is part of the body's digestive system. The digestive system removes and processes nutrients (vitamins, minerals, carbohydrates, fats, proteins, and water) from foods and helps pass waste material out of the body. The digestive system is made up of the esophagus, stomach, and the small and large intestines. The first 6 feet of the large intestine are called the large bowel or colon. The last 6 inches are the rectum and the anal canal. The anal canal ends at the anus (the opening of the large intestine to the outside of the body).

Age and health history can affect the risk of developing colon carcinoma .

Risk factors include the following:

  • Age 50 or older.
  • A family history of carcinoma of the colon or rectum.
  • A personal history of carcinoma of the colon, rectum, ovary, endometrium, or breast.
  • A history of polyps in the colon.

These and other symptoms may be caused by colon carcinoma

Other conditions may cause the same symptoms. A doctor should be consulted if any of the following problems occur:

  • A change in bowel habits.
  • Blood (either bright red or very dark) in the stool.
  • Diarrhea, constipation, or feeling that the bowel does not empty completely.
  • Stools that are narrower than usual.
  • Frequent gas pains, bloating, fullness, or cramps.
  • Weight loss for no known reason.
  • Feeling very tired.
  • Vomiting.

Colon carcinoma
Colon Carcinoma Picture

Tests that examine the rectum, rectal tissue, and blood are used to detect (find) and diagnose colon carcinoma

Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient's health habits and past illnesses and treatments will also be taken.

Fecal occult blood test: A test to check stool (solid waste) for blood that can only be seen with a microscope. Small samples of stool are placed on special cards and returned to the doctor or laboratory for testing.

Fecal Occult Blood Test (FOBT) kit to check for blood in stool

Digital rectal exam: An exam of the rectum. The doctor or nurse inserts a lubricated, gloved finger into the rectum to feel for lumps or anything else that seems unusual.

Barium enema: A series of x-rays of the lower gastrointestinal tract. A liquid that contains barium (a silver-white metallic compound) is put into the rectum. The barium coats the lower gastrointestinal tract and x-rays are taken. This procedure is also called a lower GI series.

Sigmoidoscopy: A procedure to look inside the rectum and sigmoid (lower) colon for polyps, abnormal areas, or cancer. A sigmoidoscope (a thin, lighted tube) is inserted through the rectum into the sigmoid colon. Polyps or tissue samples may be taken for biopsy.

Colonoscopy: A procedure to look inside the rectum and colon for polyps, abnormal areas, or cancer. A colonoscope (a thin, lighted tube) is inserted through the rectum into the colon. Polyps or tissue samples may be taken for biopsy.

Biopsy: The removal of cells or tissues so they can be viewed under a microscope to check for signs of cancer.

Virtual colonoscopy: A procedure that uses a series of x-rays called computed tomography to make a series of pictures of the colon. A computer puts the pictures together to create detailed images that may show polyps and anything else that seems unusual on the inside surface of the colon. This test is also called colonography or CT colonography.

The prognosis (chance of recovery) depends on the following:

  • The stage of the carcinoma (whether the cancer is in the inner lining of the colon only, involves the whole colon, or has spread to other places in the body).
  • Whether the carcinoma has blocked or created a hole in the colon.
  • The blood levels of carcinoembryonic antigen (CEA; a substance in the blood that may be increased when carcinoma is present) before treatment begins.
  • Whether the carcinoma has recurred.
  • The patient's general health.

Colon Carcinoma Treatment options depend on the following:

  • The stage of the colon carcinoma .
  • Whether the colon carcinoma has recurred.
  • The patient's general health.

National Cancer Institute

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