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Int J Trichology. 2014 Oct;6(4):185-6. doi: 10.4103/0974-7753.142886.

An unusual location of a pilar sheath acanthoma.

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Department of Internal Medicine, Largo Medical Center, Largo, FL, USA.
Department of Dermatology, Silver Falls Dermatology, Salem, OR, USA.


Pilar sheath acanthoma is a rare, benign follicular hamartoma that frequently presents as an asymptomatic, flesh-colored papule with a central opening. First described in 1978 by Mehregan and Brownstein, these lesions generally appear on the upper lip of elderly patients. We present an interesting case of a pilar sheath acanthoma presenting on the earlobe in a middle-aged male. To the best of our knowledge, this is the first reported case of a pilar sheath acanthoma found in such a unique location.


Pilar sheath acanthoma; benign follicular hamartoma; pilar neoplasm

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