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KMID : 0032220100220040431
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Annals of Dermatology
2010 Volume.22 No. 4 p.431 ~ p.434
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A Case of Trichogerminoma
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Kim Min-Ji
Choi Mi-Ra
Hong Jong-Soo
Lee Jong-Hee
Cho So-Yun
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Abstract
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Trichogerminoma is a rare neoplasm which was first described in 1992 and there is still controversy over its inclusion into the spectrum of trichoblastoma. A 79-year-old woman presented with a 5-year history of an asymptomatic nodule on the left posterior neck. Histologically, the lesion revealed a well-demarcated deep dermal nodule surrounded by a pseudocapsule. The tumor was composed of lobules with basophilic cells and some of the lobules displayed a distinctive pattern of densely packed ’cell balls’ with peripheral condensation. Immunohistochemically, the tumor cells showed zonal CK5/6 immunoactivity in contrast with the negatively stained ’cell balls’. These characteristics were compatible with the diagnosis of trichogerminoma. We report here on a rare case of a hair germ tumor called trichogerminoma.
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KEYWORD
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Cell ball, Hair germ tumor, Trichoblastoma, Trichogerminoma
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