PRTN3 and anemia: Hx: 35 y M tobacco/cannabis smoker, intranasal cocaine use, inhaled crack use; admitted to ED with hemoptysis, iron deficiency anemia CT chest: bilateral ground glass opacities; Lab: urea 7.1 mmol/L; Cr 150 μmol/L; Na 136 mmol/L; K+ 4 mmol/L; ANA -; c-ANCA -; p-ANCA +; cryoglobulinus -; HBV/HCV/HIV neg; Renal biopsy: active segmental fibrinoid necrosis, no arteries vasculitis, diffuse epithelial cell foot process effacement and deposit of immune complex; Dx: concurrent AAV secondary to LAC and associated MN;Tx: prednisone, cyclophosphamide