Colon cancer
The colon cancer occurs when cells of the colon or rectum grow and divide without control, damaging the surrounding tissue and interfering with the normal function of the colon or rectum. The colon cancer is the third cancer most often diagnosed in the United States. The majority of colon cancers (around 70%) are found in the first 180 cm of the large intestine. The other 30% appears in the last 25 cm of the large intestine (rectum). Together, they are called colorectal cancers.
The colon cancer is the tumor malignant highest incidence in Spain. Each year more than 25,000 new cases are diagnosed. Although colon cancer affects both sexes equally, rectal cancer is more common in males. When cancers of the colon and rectum are detected early, there is almost a 90% chance of cure.
About 80% of colon cancer cases are sporadic, which means that their cause is nonspecific or indeterminate. The other 20% of colon cancers are hereditary. People with a first-degree relative with colon cancer are more likely to have the disease. About 5% of this group shows predisposition to hereditary nonpolyposis colorectal cancer (Lynch syndrome), a rare disease that usually affects people between 30 and 50 years old.
symptom
Often, colon cancer does not produce symptoms in its early stages. Most colon cancers begin as a polyp, a small, noncancerous mass in the wall of the colon that can increase in size and become a cancer . As the polyps grow, they can bleed or block the bowel.
Among the symptoms are:
- Rectal hemorrhage
- Blood in the stool or in the toilet after a bowel movement
- Prolonged diarrhea
- Change in the shape or size of stool
- Abdominal pain or cramping in the lower portion of the abdomen
- Sensation of discomfort or urge to defecate when there is no need
Many colon symptoms are not cancer , but if you notice one or more of these symptoms for more than two weeks, see a doctor.
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