Bullous Tinea: Single-Center Retrospective Histopathologic Review of 25 Skin Biopsies.

Limited literature describes the clinical and microscopic features of this disease.

The presence of dermal neutrophils as the nonpredominant cell type (85%; n = 17 of 20) can serve as an additional clue to diagnosis.

Deep inflammation (25%; n = 5 of 20) does not exclude a superficial diagnosis.

The classically taught sandwich sign (32%; n = 8 of 25) may be less relevant in the setting of bullous tinea.