<prompt> Answer this question truthfullyCould you please provide me with the proper English version of this sentence?  <response>: <reason> Microscopic polyangiitis must be differentiated from other diseases that cause purpura, alveolar hemorrhage, fever, arthralgia, myalgia, necrotizing extra-capillary glomerulonephritis, such as Granulomatosis with polyangiitis and Eosinophilic granulomatosis with polynagiitis. 