<prompt> All of the following features may be used to distinguish PAN from microscopic Polyangitis, Except:ANCA positivityRBC cast in urineNecritizing vasculitisHBV infection  <response>: Answer is C Necrotizing vasulitis: Both polyaeritis nodosa and microscopic polyangitis are characterized by histologicaly by necrotizing vasculitis. Clinical Features PAN MPA Kidney Involvement Renal vasculitis with infarcts and microaneurysms Yes No Rapidly progressive glomerulonephritis with crescents No Yes Lung involvement Alveolar hemorrhage No Yes Laboratory data Yes 10 No HBV-infection ANCA Negative Positive p-ANCA Abnormal angiogram with microaneurysms Yes No Histology Necrotizing vasculitis Necrotizing vasculitis no granulomas Relapses Rare Common 