As a general rule, in the early stages of many types of cancer do not cause any symptoms. So, usually when patients are diagnosed the cancer has already spread. But being a proposed examination of patients even if they do not show any symptoms. Bleeding from the anus, and abnormalities in the bowel movements, including diarrhea and constipation are usually the earliest symptoms.
Diarrhea may be sign of a viral or bacterial infection, but if it persists for more than three weeks, and it can be a sign of colon cancer and requires urgent medical attention. In the later stages of bowel cancer, and can be loss of appetite and weight occur.
Fortunately, cancer of the intestine from fairly easy to be detected in early stages, especially if the individual is subject to regular check-ups, because this type of cancer is very slow to develop. It takes about 10 years to become cancerous adenoma, and turn into a tumor and affect the deeper tissues of the large intestine. Even if a person does not fall in the categories of increased risk of bowel cancer, should not ignore the symptoms persist and should seek medical advice in no later than two months after the start of symptoms that occur.
Symptoms vary and not everyone will experience all of the symptoms. The most common signs of colon cancer is the change is unusual in the usually the intestine, especially in the need to empty the bowel more frequently or less frequently than bleeding, normal rectum, especially when there was a lot of blood and they mixed with the stool, severe abdominal pain, anemia resulting from loss of blood, weakness and fatigue. Rectal cancer usually causes bleeding from the anus, as well as the need for frequent bowel movements.
Most of these symptoms are vague, which can be caused by something other than cancer. However, it is a matter of concern if more of the symptoms occur as well as if it continues for a longer period of time.
If the cancerous growth begins ban the large intestine, and the patient may experience recurring pain in the lower abdomen. If the colon completely blocked, this results in pain, severe constipation and vomiting. In this case, there is a need for an emergency operation, bowel obstruction because the situation may lead to gangrene.
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