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March> 1, 2008

Solitary Nodule in a 3-Month-Old Infant—Quiz Case

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Arch Dermatol. 2008;144(3):405-410. doi:10.1001/archderm.144.3.dof70020-c

A 3-month-old male infant with an enlarging lesion on the right arm that had been present since birth was evaluated. His mother noted rapid growth over a period of 1 month, with central crusting and minimal bleeding. The patient was born full-term in a normal spontaneous vaginal delivery to a gravida 1, para 1 mother. He had no other medical problems, and family history was noncontributory.

Physical examination revealed a 3.0 × 2.5-cm, well-circumscribed nodule on an erythematous base with superficial crusting and ulceration (Figure 1). The lesion was nontender, firm, rubbery, and freely mobile. A 4-mm punch biopsy specimen was obtained for further evaluation (Figure 2 and Figure 3).