NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,790 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.

ostomy
(OS-toh-mee)
An operation to create an opening (a stoma) from an area inside the body to the outside. Colostomy and urostomy are types of ostomies.