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(... non-MEH-luh-NOH-muh skin KAR-sih-NOH-muh in SY-too)
![](https://webarchive.library.unt.edu/eot2008/20090514070946im_/http://www.cancer.gov/images/spacer.gif)
| Abnormal cells are found in the squamous cell or basal cell layer of the epidermis (outer layer of skin). These abnormal cells may become cancer and spread into nearby normal tissue. Also called nonmelanoma carcinoma in situ. |
Previous Definitions: | stage 0 medullary thyroid carcinoma in situ, stage 0 melanoma, stage 0 nasal cavity and ethmoid sinus carcinoma in situ, stage 0 nasopharyngeal carcinoma in situ, stage 0 non-small cell lung carcinoma in situ | Next Definitions: | stage 0 oropharyngeal carcinoma in situ, stage 0 pancreatic carcinoma in situ, stage 0 penile carcinoma in situ, stage 0 testicular carcinoma in situ, stage 0 transitional cell carcinoma in situ of the renal pelvis and ureter |
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