An important cause of non-resolving pneumonia.

We describe the case of a young patient with a history of non-resolving pneumonia. She was diagnosed with a limited form of Granulomatosis with Polyangiitis (GPA), by percutaneous core needle lung biopsy. In this report, we discuss the definition and clinical implications of limited GPA, treatment options, and highlight the importance of considering vasculitis in the differential diagnosis of non-resolving pneumonia.