A 9-year-old Chinese-American boy presented with a 4-month history of a nontender papule on the dorsal aspect of the second digit of his right hand. Initially, the lesion had slowly enlarged, but it had been stable for several weeks before presentation. There was no history of trauma, arthropod bite, or surgical procedure. Physical examination revealed a 4-mm, pink, nonscaly, firm dermal papule with a slightly hyperpigmented rim (Figure 1). A shave biopsy specimen was obtained and evaluated with hematoxylin-eosin (Figure 2 and Figure 3) and immunohistochemical staining, the findings of which confirmed the diagnosis.
Krathen M, Koch L, Barak O, Lizzul P. Tender Papule on the Finger of a Child —Quiz Case. Arch Dermatol. 2011;147(8):975–980. doi:10.1001/archdermatol.2011.197-a
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