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July 2011

Double-Headed Nodules on the Abdomen —Quiz Case

Author Affiliations
 

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

Arch Dermatol. 2011;147(7):857-862. doi:10.1001/archdermatol.2011.163-a

A 69-year-old man presented with an 8-month history of nodules growing on his abdomen. The nodules were tender, but otherwise he was healthy. Physical examination revealed 50   ×  45-mm and 35   ×  30-mm hard polypoidal nodules that occurred as an irregularly shaped single hard brown plaque on his abdomen (Figure 1). A skin biopsy was performed, and the specimen was analyzed under hematoxylin-eosin staining (Figure 2). A genetic study was also carried out (Figure 3).

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