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nonmelanoma skin carcinoma in situ on the head and neck (not on the eyelid)

(non-MEH-luh-NOH-muh skin KAR-sih-NOH-muh in SY-too ...)
Abnormal cells are found in the squamous cell or basal cell layer of the epidermis. These abnormal cells may become cancer and spread into nearby normal tissue. Also called stage 0 nonmelanoma skin carcinoma in situ on the head and neck (not on the eyelid).
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Nonmelanoma skin cancer of the head and neck (carcinoma in situ); drawing shows abnormal squamous cells and basal cells in the epidermis. Also shown are the dermis and the subcutaneous tissue below the dermis. There are two insets: the inset on the left shows a close up of normal and abnormal squamous cells; the inset on the right shows a close up of normal and abnormal basal cells.Enlarge this image in new window
Nonmelanoma skin cancer of the head and neck (carcinoma in situ). Abnormal cells are found in the squamous cell or basal cell layer of the epidermis. These abnormal cells may become cancer and spread into nearby normal tissue.
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