NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 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.

cecum
(SEE-kum)
A pouch that forms the first part of the large intestine. It connects the small intestine to the colon, which is part of the large intestine.

EnlargeDrawing shows the cecum, ascending colon, transverse colon, descending colon, sigmoid colon, and rectum. Also shown is the small intestine.

The cecum connects the small intestine to the colon. The colon includes the ascending colon, transverse colon, descending colon, and sigmoid colon. The sigmoid colon connects to the rectum.