A 40-year-old man, a butcher, died of sepsis. On his right check there is a dense dark-red cone-shaped infiltration, 6 cm in size, with a black scab in its center. The right hallot his lace and neck are markedly Swollen and dense. In the infiltration, microscopy detects a peracute sero- hemorrhagic inflammation. Epidermis and its underlying layers are necrotic in the center of the infiltration. What diagnosis was made by the pathologist?