Idiopathic RPGN

Idiopathic RPGN •Electron microscopy showing compressed glomerular capillary basement membranes with no evidence of immune complex deposition. •The urinary space in the top of the photograph shows portion of a crescent with the dark strands representing fibrin (arrow). •Direct immunofluorescence studies in cases of idiopathic rapidly progressive glomerulonephritis (RPGN) are negative. (Description By:H. Yamase, M.D. ) (Image Contrib. by: UCHC )