PRTN3 and pyoderma gangrenosum: Hx: 52 y F chronic cocaine user admitted with ulcers on extremities; pustule, rash on arms/axilla/temple; longstanding perforation hard palateLab: c-ANCA+; LA+Skin biopsy: superficial neutrophil-rich dermal infiltrate, papillary derma edema Dx: pyoderma gangrenosum associated with LACTx: prednisone, topical betamethasone