LAUSR

A previously healthy 13yearold boy presented to clinic with an enlarging red nodule on the chin. It began 3 weeks prior, initially looking like a “pimple.” He was evaluated by his primary care physician and referred to dermatology for what appeared to be cystic acne. The patient reported that the nodule was asymptomatic, never producing pain or exudate. There was no history of prior trauma, and he denied a personal or family history of acne. He tried over-the-counter benzoyl peroxide gel along with warm compresses, neither of which helped. Physical examination revealed an approximately 1.5 cm firm, nonfluctuant pinkred nodule on the right side of the chin (Figure 1). Dermoscopic evaluation revealed follicular accentuation with perifollicular hypopigmentation and rare branching vessels (Figure 2). Few small red papules and comedones were noted on other areas of the face, and a lymph node examination was negative. A 3 mm punch biopsy was performed and submitted for histologic examination, of which representative hematoxylin and eosinstained sections are shown (Figure 3A, original magnification x20; Figure 3B, original magnification x100).