A 58-year-old man with diabetes mellitus presented with a 1-month history of nodules on his entire body. He had loss of appetite, myalgia, and fever soon followed by the onset of nodules that progressed to ulcers. Physical examination found nonpruritic, painless, multiple, variable-sized, erythematous, ulcerative nodules with central crusts on his face, trunk, and extremities (Fig 1). A biopsy specimen of the lesion was obtained (Fig 2), which showed an acanthotic epidermis and intense lichenoid lymphohistiocytic infiltrate rich in plasma cells in the dermis and extended around vessels. Question 1. What is the most likely diagnosis? A. Kyrle disease B. Pyoderma gangrenosum C. Malignant syphilis D. Febrile ulceronecrotic Mucha-Habermann disease E. Disseminated herpes zoster