Pustular pyoderma gangrenosum

Definition

A rare subtype of pyoderma gangrenosum characterized by multiple painful, sterile pustules with a surrounding erythematous halo, predominantly occurring on the trunk and extensor surfaces of the limbs, and potentially persisting for months. Histopathology shows a dermal neutrophilic infiltrate and subcorneal neutrophilic micropustules. The condition is commonly associated with inflammatory bowel disease.