Ecthyma gangrenosum is a rare necrotizing cutaneous infection usually caused by Pseudomonas aeruginosa. We report a case of ecthyma gangrenosum presenting as a sinonasal eschar and mimicking acute invasive fungal sinusitis in an immunocompromised 39-year-old man with a hematologic malignancy To the best of our knowledge, this represents the first case of ecthyma gangrenosum affecting the sinonasal mucosa to he reported in the literature.
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