Membranoproliferative glomerulonephritis overview

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Ali Poyan Mehr, M.D. [2] Associate Editor(s)-in-Chief: Olufunmilola Olubukola M.D.[3]

Overview

Membranoproliferative glomerulonephritis or MPGN is a type of glomerulonephritis caused by immune complexes depositing in the kidney glomerular mesangium and basement membrane (GBM), activating complement and damaging the glomeruli. The GBM is rebuilt ontop of the deposits, causing a "tram-tracking" appearance under the microscope. Membranoproliferative Glomerulonephritis (MPGN) is a relatively uncommon inflammatory glomerulopathy that can cause chronic nephritis. Based on the histological pattern of glomerular injury it has been described as a chronic kidney disease found mostly in children and young adults. Like many forms of glomerulopathies, membranoproliferative glomerulonephritis (glomerulopathy) has been a diagnosis of tissue pathology rather the diagnosis of a specific disease entity. Therefore, the term membranoploriferative glomerulonephritis (MPGN) relates to a pattern of glomerular injury characterized by mesangial proliferation and expansion, lobularization of the glomerular tufts and double contours which can be caused by many disease states.

Glomerular injury occurs due to deposition of immune complexes on the glomerular mesangium or on the glomerular basement membrane. MPGN has been categorized into 3 types based on the histological pattern of glomerular damage. Clinically, MPGN often present with hematuria, varying degrees of proteinuria, with or without Glomerular filtration rate impairment depending on the severity of glomerular injury, and the underlying etiology.

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