adenocarcinoma in situ


ad·e·no·car·ci·no·ma in si·'tu

a noninvasive, abnormal proliferation of glands believed to precede the appearance of invasive adenocarcinoma; reported in the endometrium, breast, large intestine, cervix, and other sites.

ad·e·no·car·ci·no·ma in si·tu

(adĕ-nō-kahr-si-nōmă in sitū) Noninvasive, abnormal proliferation of glands believed to precede the appearance of invasive adenocarcinoma.

adenocarcinoma in situ

Abbreviation: AIS
A localized cluster of malignant appearing cells found in a gland but not yet spreading outside the basement membrane of the gland.See also: adenocarcinoma