NCI Dictionary of Cancer Terms
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adenocarcinoma in situ (A-deh-noh-KAR-sih-NOH-muh in SY-too)
|A condition in which abnormal cells are found in the glandular tissue that lines certain internal organs, such as the uterus, cervix, lung, pancreas, and colon. Adenocarcinoma in situ, which occurs most often in the cervix, may become cancer and spread to nearby normal tissue. Also called AIS.|