Secondary Cutis Verticis Gyrata Due to Pilar Smooth Muscle Proliferation: Multiple Leiomyomas or Pilar Muscle Hyperplasia?
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چکیده
We report a 66-year-old man with two closely neighbored, asymptomatic, markedly elevated noduloplaques over each eyebrow symmetrically for about 1 to 2 years. The convoluted folds and deepening furrows formed from thickened skin of and between the eyebrows resembled the pattern of cutis verticis gyrata which typically affected the scalp. Histologically, it presented as smooth muscle proliferation. However, it is unlikely for an acquired tumor, whether leiomyoma or smooth muscle hamartoma, developed on both eyebrows simultaneously. We prefer it is pilar muscle hyperplasia. Unlike previously reported cases of secondary cutis verticis gyrata, it may be the first case caused by pilar muscle hyperplasia. (Dermatol Sinica 26: 22-27, 2008)
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