Abstract
A 41-year-old man noticed painful erythema on his right lower abdomen. Similar lesions, discharging pus, appeared subsequently over his bilateral lower extremities and axilla during the last two years since his initial onset. Therefore, we diagnosed this patient as ectopic pyoderma chronica. Consequent surgical resection of those lesions successfully introduced a significant improvement towards this patient. However, a differential diagnosis of pyoderma gangrenosum, which can be comparable both by clinically and histologically with pyoderma chronica, initially led us to the standard regimens for pyoderma gangrenosum: i.e. oral betamethasone, salazosulfapyridine, cyclosporine; those medications failed to provide remarkable benefit for this patient.
