case_images: PMC11286406_01
case_images: Left post-auricular mass. Left ear proptosis with an erythematous, tender post-auricular fluctuant mass.
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case_images: PMC11286406_01_fimmu-15-1425289-g001.jpg
case_images: f1
case_images: Physical examination on presentation revealed an erythematous, fluctuant lump behind the left ear that was tender and warm with cervical lymphadenopathy ( Figure 1 ).
case_images: Sweet syndrome skin lesions. Right and left posterior calf subcutaneous nodules with a central necrotic opening.
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case_images: PMC11286406_01_fimmu-15-1425289-g002.jpg
case_images: f2
case_images: During the hospitalization, the patient developed numerous new lesions on the right posterior neck, mid-back, right and left posterior calves ( Figure 2 ), and left gluteal fold despite antibiotic therapy.
case_images: Histopathologic findings from patient's right calf biopsy. Biopsy from the right calf lesion revealed dense dermal neutrophilic infiltration (black arrow), increased eosinophils, and perivascular chronic inflammation without evidence of infection.
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case_images: f3
case_images: The pathology from a specimen containing only epidermis and dermis revealed a dense dermal neutrophilic infiltration, increased eosinophils, and perivascular chronic inflammation without evidence of infection, suggestive of acute febrile neutrophilic dermatosis, also known as Sweet syndrome ( Figure 3 ). Three weeks after initial admission, the patient was seen by Dermatology for concern for poor wound healing of the I&D site for which they recommended applying silver-carboxymethylcellulose dressings to the area.