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Correspondence |

A Preauricular Hairy Papule in an Infant: Hair Follicle Nevus Closely Similar to Accessory Tragus

Kotaro Nagase, MD, PhD; Koichi Nagase, MD; Noriyuki Misago, MD, PhD; Yutaka Narisawa, MD, PhD
Arch Dermatol. 2012;148(2):266-268. doi:10.1001/archdermatol.2011.2135.
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Accessory tragus is a fairly common congenital malformation of the external ear. However, it is extremely difficult to make a distinction between accessory tragus without cartilage and hair follicle nevus. Hair follicle nevus is an extremely rare adnexal hamartoma with follicular differentiation that commonly presents as a nodule on the face.

Correspondence: Dr Kotaro Nagase, Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan (kotaro@nagase-skin.com).

Financial Disclosure: None reported.

Additional Contributions: We are indebted to the generous patient who made this report possible.

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Figure 1. A pedunculated papule. A, Clinical findings of a pedunculated papule in the right preauricular area. B, A close-up view of the papule (3   ×  3 mm).

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Figure 2. Histopathologic findings of the right preauricular papule. Tiny mature hair follicles in different stages in the dermis (hematoxylin-eosin, original magnification ×40).




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