Diffuse alveolar hemorrhage in IgA nephropathy: case series and systematic review of the literature.

Objectives: To describe the spectrum of pulmonary involvement in immunoglobulin A nephropathy (IgAN).

Methods: We describe two patients with pulmonary renal syndrome related to IgAN and a systematic review of previously reported cases of IgAN and lung involvement.

Results: We identified 23 reports of IgAN-related pulmonary disease, including 19 reports of alveolar hemorrhage and two cases of organizing pneumonia.