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In dermatologic pathology, a dermal cylindroma, also dermal eccrine cylindroma) and (less specifically) cylindroma, is a benign adnexal tumor, which occurs on the scalp and forehead. Multiple cylindromas may grow together in a "hat-like" configuration, the so-called "turban tumor." Cylindromas are uncommon dysplasias of skin appendages. ==Histology== Dermal cylindromas are: *dermal lesions consisting of nests of cells that are surrounded by hyaline (i.e. glassy, eosinophilic, acellular) material and have: * *hyperchromatic nuclei that may palisade (columnar nuclei arranged around the periphery of the cells nests - with their short axis tangential to the nest periphery), and * *cells with lighter staining ovoid nuclei at their centre. They lack of a significant number of lymphocytes; this differentiates them from spiradenomas. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dermal cylindroma」の詳細全文を読む スポンサード リンク
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