carcinoma in situ

noun

Medical Definition of carcinoma in situ

: carcinoma in the stage of development when the cancer cells are still within their site of origin (as the mouth or uterine cervix) abbreviation CIS

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“Carcinoma in situ.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/carcinoma%20in%20situ. Accessed 25 Nov. 2020.

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