carcinoma in situ
noun
: 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
Cite this Entry
“Carcinoma in situ.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/carcinoma%20in%20situ. Accessed 17 May. 2025.
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