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Pediatr Dermatol. 2008 Jan-Feb;25(1):60-2. doi: 10.1111/j.1525-1470.2007.00584.x.

Hair follicle nevus in a 2-year old.

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  • 1Department of Dermatology, Gunma University Graduate School of Medicine, Gunma, Japan.


We report a 2-year-old boy with an elastic soft, flatly elevated, skin-colored nodule on his nasal ala. Histologic examination revealed numerous small hair follicles in several stages of maturation in the dermis. Serial sections did not show any cartilage or a central epithelial lined cystic structure. Based on clinico-pathologic findings, we diagnosed this lesion as a hair follicle nevus. Hair follicle nevus is quite rare. Histologically, it is very important not to find cartilage or a central epithelial lined cystic structure for distinction from an accessory auricle and from a trichofolliculoma, respectively. Awareness of the clinical and pathologic characterization of hair follicle nevus is an aid to a correct diagnosis.

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