Related Experiment Video
Updated: May 31, 2026

Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
Published on: August 23, 2024
IgG4-related tubulointerstitial nephritis with membranous nephropathy
Fernando C Fervenza1, Gregory Downer, Laurence H Beck
1Division of Nephrology and Hypertension, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA.
Abstract:
We describe a 67-year-old woman who presented with significant proteinuria and hematuria. Kidney biopsy showed immunoglobulin G4 (IgG4)-related tubulointerstitial nephritis (TIN) with concurrent membranous nephropathy. IgG4-related TIN is a recently described entity that presents with progressive decreased kidney function and is characterized by a plasma cell-rich infiltrate that is positive for IgG4. It is associated with patchy, often well-localized, tubular atrophy and interstitial fibrosis. Workup for circulating anti-phospholipase A(2) receptor antibodies was negative, suggesting that the membranous nephropathy was not "primary" and may be linked to the IgG4-related disease. The presence of significant proteinuria and hematuria in the setting of IgG4-related TIN should raise suspicion of a glomerular disease. It is important to correctly diagnose IgG4-related TIN and concurrent membranous nephropathy because the lesion responds well to steroid therapy.
More Related Videos
Related Concept Videos
Nephrotic Syndrome I : Introduction
Acute Kidney Injury II: Pathophysiology
Type IV Collagen of Basal Lamina
A type IV collagen molecule has six alpha chains which can exist in...
Chronic Kidney Disease III: Interprofessional Care
Diabetic Nephropathy
Renal Corpuscle
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...

