Published: Aug. 23, 2011
Updated: Aug. 23, 2011
Adenocarcinoma is the type of cancer cell found in 90 to 95 percent of colon cancer cases. Adenocarcinoma forms from the cells that help produce the mucus that line the colon or rectum.
Carcinoid tumors and neuroendocrine tumors can rarely form in the gastrointestinal tract and usually grow slowly, but their prognosis depends on their type and where they began.
Gastrointestinal stromal tumors can form anywhere in the digestive tract. Rarely, they form in the colon. For more about these tumors, see the sarcoma section.
Lymphomas are cancers of immune system cells. They rarely begin in the colon or rectum. For more information about lymphomas, see the leukemias, lymphomas, and myelomas section.
Recurrent colorectal cancer is cancer that has disappeared after treatment but now has come back, either in or near the colon or rectum, or in other organs.
Learn more about colorectal cancer: