<prompt> Microscopic polyangiitis is characterized by the following features EXCEPTInvolves small and medium sized arteries and veins75 cases are associated with ANCA positivityPalpable purpura, ulcers and vesiculo bullous lesionUnlikely to cause pulmonary renal syndrome  <response>: Ans. d Unlikely to cause pulmonary renal syndromeRef: Robbins 9thpg 510-11; 8thpg 515Microscopic polyangiitis MPOption a true- MP is small vessel vasculitisTypically spare medium-sized and larger arteriesOption b is true- P-ANCA is present is majority of the patients.Option c is true- major clinical features include hemoptysis, hematuria and proteinuria, bowel pain or bleeding, muscle pain or weakness, and palpable cutaneous purpura.Skin findings are as follows:Palpable purpura 41, Leukocytoclastic angiitis, livedo reticularis 12, skin ulcerations, necrosis and gangrene, necrotizing nodules and digital ischemia 7Urticaria - Vasculitis-associated urticaria that lasts longer than 24 hours Option d is false- Necrotizing glomerulonephritis 90 of patients and pulmonary capillaritis are common, 