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KMID : 0352419920110040620
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Keimyung Medical Journal
1992 Volume.11 No. 4 p.620 ~ p.623
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A Case of Proliferating Trichilemmal Tumor
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류영욱
최윤애/이규석/송준영/박관규
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Abstract
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Proliferating trichilemmal tumor occurs occurs predominantly over the scalp of women in the from of a single nodular lesion. Occasionally, the lesion appears in individuals with multiple trichilemmal cysts or shows involvement of a good portion
of
scalp
with exophytic lesion or with a large plaque exhibiting surface nodularities. Histologically, the lesion is made up of proliferation of the outer root sheath epithelium with many central areas of trichilemmal keratinization and homogenous keratin
cyst
formation. The presence of low grade cellular atypia, individual cell keratinization, occasional dyskeratotic cells and mitotic figures may provide a false impressionof an invasive squamous cell cerainoma. We are reporting a case of proliferating
trichilemmal tumor in an 74-year-old woman with recent history of rapid enlagemnt of long stading exophytic scalp leision. Histologic section shows trichilemmal keratinization characterisic fo a proliferating trichilemmal tumor. There were also
abnormal
mitosis, marked cellular plemorphism, and infiltrating margin suggesting malignant transformation.
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KEYWORD
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