SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; SENAIT W. DYSON, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD
A 58-year-old man presented with a 1-month history of slightly pruritic, grayish brown macular lesions symmetrically located on his axillae, lower abdomen, and groin (Figure 1 and Figure 2). He had neither taken medi-cines nor applied any cosmetics to his body. On physical examination, the lesions were found to comprise mainly grayish brown macules or papules along with a few violet-gray plaques. The lower abdomen lesion was broadly located at the intertriginous zone, created by the waistband of his clothing. His mucous membranes, nails, palms, and soles were not affected. A skin biopsy specimen was obtained from the violet-gray plaques on the right lower abdomen, and hematoxylin-eosin staining was performed (Figure 3).
Nagai H, Sakaguchi M, Ikeda T, Nishigori C. Grayish Brown Macules on the Axillae, Lower Abdomen, and Groin —Quiz Case. Arch Dermatol. 2011;147(9):1097-1102. doi:10.1001/archdermatol.2011.251-a