Neoplastic Process
carcinoma in situ Audio
car·ci·no·ma in si·tu [ kar-sih-noh-muh in sy-too ]
Subclass of:
Carcinoma
Definitions related to carcinoma in situ:
  • 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.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • A lesion with cytological characteristics associated with invasive carcinoma but the tumor cells are confined to the epithelium of origin, without invasion of the basement membrane.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • A malignant epithelial neoplasm which is confined to the epithelial layer without evidence of further tissue invasion.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.