An 80-year-old woman with a history of hypertension, hyperlipidemia, psoriasis vulgaris with associated pruritus, and well-controlled type 2 diabetes mellitus presented with a slowly enlarging ulceration on her left leg of 1 year’s duration. She noted that this lesion healed less rapidly than previous stasis leg ulcerations, despite using the same treatment approach that included dressings, elevation, and diuretics to decrease pedal edema.
Physical examination revealed plaques with white micaceous scaling over her extensor surfaces and scalp, as well as guttate lesions on the trunk, typical of psoriasis vulgaris. A 5.8 × 7.2-cm malodorous ulceration was superimposed on a large psoriatic plaque on her left anterior lower leg (FIGURE 1). A 4-mm punch biopsy was obtained from the peripheral margin.