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carcinoma in situ (KAR-sih-NOH-muh in SY-too)

 A group of abnormal cells that remain in the place where they first formed. They have not spread. These abnormal cells may become cancer and spread into nearby normal tissue. Also called stage 0 disease.



Previous Definitions:carcinogen, carcinogenesis, carcinoid, carcinoid syndrome, carcinoma
Next Definitions:carcinoma of unknown primary, carcinomatosis, carcinomatous meningitis, carcinosarcoma, carcinosis

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