Adnexal metaplasia in carcinoma in situ of the skin.
Two cases of epidermoid carcinoma in situ of the skin, one with mucinous metaplasia and the other with sebaceous metaplasia, are reported. These unique cases suggest a spectrum of differentiation possible by neoplastic epidermal keratinocytes, which may help in the understanding of the histogenesis of certain skin neoplasms.
D000368:Aged; D002278:Carcinoma in Situ / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D006801:Humans; D008297:Male; D008679:Metaplasia; D008875:Middle Aged; D012627:Sebaceous Glands / Q000473:pathology*; D012867:Skin / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*