Pneumocephalus and Cerebral Abscess in Granulomatosis With Polyangiitis.

Granulomatosis with polyangiitis (GPA) is a systemic autoimmune disease that causes necrotizing vasculitis of small- to medium-sized blood vessels and necrotizing granulomatous inflammation, primarily of the upper and lower respiratory system. A 33-year-old woman presented with a 16-month history of headaches, nasal obstruction, and anosmia.