NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,804 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

stage 0 colorectal carcinoma in situ
(...KOH-loh-REK-tul KAR-sih-NOH-muh in SY-too)
Abnormal cells are found in the mucosa (innermost layer) of the colon and/or rectal wall. These abnormal cells may become cancer.

EnlargeStage 0 colon/rectal carcinoma in situ; shows a cross-section of the colon/rectum. An inset shows the layers of the colon/rectum wall with abnormal cells in the mucosa layer. Also shown are the submucosa, muscle layers, serosa, a blood vessel, and lymph nodes.

Stage 0 colon/rectal carcinoma in situ. Abnormal cells are shown in the mucosa of the colon/rectum wall.