Consultant: Volume 15 - Issue 11 - November 2016

A Boy With a Macular, Golden-Brown Patch

Authors: 

Kush S. Patel, BS; Richard H. Flowers, MD; and Barbara B. Wilson, MD 

Citation: 

CFP. 2016;15(11):535-537.

A 4-year-old boy presented with a 1.5-year history of a rash on his right buttock. There was no associated tenderness, pruritus, or erythema, and his mother noted that the lesion had been growing slightly since its onset. A review of systems was negative for any constitutional or integumentary symptoms, and the boy’s family history was unremarkable. 

On physical examination, there was a 3.5 × 2 cm macular, golden-brown patch with scattered petechiae (“cayenne pepper”-like) on the right buttock (Figure 1). The results of the remainder of the examination were unremarkable. 

What is causing the boy’s rash? 

(Answer and explanation on the next page.)