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 72-year-old man was referred to our department for assessment of multiple annular, ill-defined, flesh-colored to erythematous plaques that had developed over several weeks involving his lower trunk, buttocks, and perineal region bilaterally (Figure 1). The plaques measured 0.5 to 2.5 cm in diameter and were asymptomatic. A year before, the patient had undergone a wide excision and lymph node dissection for metastatic melanoma that led to severe lymphedema of the right leg and scrotum. The patient also had a history of prostate cancer treated with surgery in 2008. A postitron emission tomographic (PET) scan performed 2 months before the development of the plaques showed no evidence of metastatic disease. A punch biopsy was performed on an annular lesion from the right upper buttock area (Figure 2 and Figure 3).
LaPresto L, Cranmer L, Erickson CP, Morrison L, Curiel-Lewandrowski C. Erythematous Annular Plaques on the Trunk—Quiz Case. Arch Dermatol. 2012;148(4):531-536. doi:10.1001/archderm.148.4.531-b