Symptoms of malignant neoplasms in the colon include red or very dark blood in the stool, a change in bowel habits, unexplained weight loss, frequent gas pains and stools that are unusually narrow, according to the Natio... More »

Early stages of a malignant neoplasm of the prostate, or prostate cancer, are asymptomatic, according to Mayo Clinic. Later, symptoms include difficulty in urinating and a diminished urine stream. They also include blood... More »

A malignant neoplasm of the brain is also known as a cancerous brain tumor. Tumors are groupings of abnormal cells in the body, notes WebMD. Growth of tumors occurs when abnormal cells continue to be added in the absence... More »

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According to Mayo Clinic, symptoms of colon cancer include rectal bleeding, persistent abdominal discomfort, unexplained weight loss, weakness or fatigue, the feeling that one's bowels do not completely empty and notable... More »

The symptoms of rectal cancer include changes in bowel habits, rectal bleeding or blood in the stool, and continuous abdominal discomfort, including gas, cramps or pain, explains Mayo Clinic. Other symptoms include a con... More »

Change in bowel habits, blood in stool and abdominal pain are all symptoms of colorectal cancer, reports the American Cancer Society. The patient may lose weight unintentionally and feel weak and tired. More »

Symptoms of cancer in the abdominal lining include trouble breathing, pain under the rib cage, abdominal pain or swelling, and unexplained weight loss, according to the National Cancer Institute. This type of cancer is c... More »

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