Adenocarcinoma in situ (AIS) is an early form of cancer that develops from glandular cells — the specialized cells that line organs and produce substances such as mucus or hormones. The phrase “in situ” is Latin for “in its original place,” meaning the abnormal cells are confined to the layer of tissue where they first …
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Adenocarcinoma in situ (AIS) of the cervix is a precancerous condition in which abnormal glandular cells grow in the surface lining of the cervix. These cells look like the cells seen in adenocarcinoma, a type of cervical cancer, but in AIS, the abnormal cells have not grown into the deeper layers of the cervical wall. …
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Adenocarcinoma in situ (AIS) is a type of early, non-invasive lung cancer. Non-invasive means the cancer cells have not grown beyond the inner lining of the tiny air sacs — called alveoli — that make up the lung. By definition, a tumor must be no larger than 3 centimeters to be classified as adenocarcinoma in …
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