Pyoderma gangrenosum associated with granulomatosis with polyangiitis: a case report

Skin involvement in granulomatosis with polyangiitis is common and is characterized by a wide spectrum of manifestations. However, the association between granulomatosis with polyangiitis and classic pyoderma gangrenosum is rare. The differential diagnosis between classic pyoderma gangrenosum and pyoderma gangrenosum-like ulceration is challenging. Only histopathological features can help practitioners differentiate the two conditions.