NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,926 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.

megestrol acetate
(meh-JES-trol A-seh-tayt)
A drug used to treat advanced breast and endometrial cancer. It is also being studied in the treatment of anorexia and cachexia in patients with cancer and in other types of cancer or other conditions. Megestrol acetate blocks the effects of the hormone estrogen in the body, which may help keep some cancer cells from growing. It may also improve appetite. Megestrol acetate is a type of progestin.