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April 2001

Infiltrated Groin Plaque in an 81-Year-Old Man

Arch Dermatol. 2001;137(4):495-500. doi:

An 81-year-old white man presented with a 6-month history of an expanding erythematous plaque on the right side of the groin. He denied bleeding, pain, or discharge. The plaque had increased in size over the past 2 to 3 months (Figure 1). The patient's medical record was significant for an 11-year history of metastatic prostate cancer. He had undergone an orchiectomy, a pelvic lymphadenectomy, and external beam radiotherapy (68 Gy). His prostate-specific antigen (PSA) level was less than 0.1 ng/mL (reference value, <4.0 ng/mL). Physical examination revealed an ill-defined, 4-cm erythematous plaque with scalloped edges. The plaque was nontender and did not blanch with pressure. Thickened, nonpitting edema was present in the inguinal and genital areas and in both lower extremities. Current medications included ascorbic acid, flutamide, furosemide, potassium, and warfarin. A 4-mm punch biopsy specimen was obtained (Figure 2 and Figure 3).

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