A 68-year-old immunosuppressed man presented with multiple ulcers and cellulitis on his right lower extremity. The patient was in good health until 6 months before admission, when routine screening revealed idiopathic thrombocytopenia with splenomegaly. The idiopathic thrombocytopenia was immediately treated with systemic steroids. After initiation of steroid therapy, the patient developed multiple ulcers circumferentially on his right lower extremity that later became cellulitic. Initiation of systemic steroid therapy in this patient was also complicated by diabetes mellitus and activation of chronic hepatitis C that contributed to cirrhosis and hepatic encephalopathy. At the time of examination, the patient was being evaluated for liver transplantation, and was assessed as Child's class B with a MELD score of 17.At the time of consultation for his lower extremity wounds, the patient's medications included oral prednisone. He was being treated with systemic voriconazole and Flagyl for a presumed polymicrobial infection of his lower extremity ulcers that had previously been unresponsive to systemic ciprofloxacin and gatifloxacin.Lower extremity examination revealed multiple well-demarcated ulcers on his right anterior and lateral lower leg (Fig. 1). The ulcers were dry and escharous and ranged in maximal diameter from 1 to 4 cm. Erythema surrounded the ulcers but without clear demarcation. Neither leg was excessively warm to touch. Neither purulence nor odor was noted. Dorsalis pedis and posterior tibial pulses were palpable bilaterally. Moderate edema was present bilaterally, and there was minimal brownish discoloration over both anterior tibial regions. The patient did not exhibit any sensory or motor deficits in his lower extremities, although movement resulted in lower extremity pain.Laboratory studies revealed severe thrombocytopenia and anemia with a mildly elevated white blood cell count. Tests for autoimmune markers including erythrocyte sedimentation rate, perinuclear antineutrophil cytoplasmic antibody, cytoplasmic antineutrophil cytoplasmic antibody, and cryoglobulins in the patient's serum were negative.Lower extremity computed tomographic scans did not find any evidence of fluid collections, subcutaneous gas, bony destruction, or periosteal reaction but did show moderate subcutaneous edema. Diagnostic skin biopsy specimens of the lower extremity ulcers and surrounding regions demonstrated diseased vasculature with thrombi in vessels along with focal necrosis, interstitial inflammation, and microabscesses. Microscopic examination also revealed multiple fungal elements. Biopsy cultures grew Escherichia coli, methicillin-resistant Staphylococcus aureus, and heavy fungal elements on all plates. The fungus was speciated as Exserohilum longirostratum that was sensitive to voriconazole; no other fungi were isolated. During his hospital course, the patient's lower extremity infection progressed and developed worsening ulcerations despite treatment with systemic antifungal therapy and local oxychlorosene-base...