Glomerulonephritis Membranoproliferative glomerulonephritis UMLS:C0017662 HP:0000793 SNOMEDCT_US:80321008 A type of glomerulonephritis characterized by diffuse mesangial cell proliferation and the thickening of capillary walls due to subendothelial extension of the mesangium. The term membranoproliferative glomerulonephritis is often employed to denote a general pattern of glomerular injury seen in a variety of disease processes that share a common pathogenetic mechanism, rather than to describe a single disease entity MPGN Mesangiocapillary glomerulonephritis MSH:D015432