title: IgG4-related tubulointerstitial nephritis with plasma cell-rich renal arteritis.
abstract: Immunoglobulin G4 (IgG4)-related tubulointerstitial nephritis is a newly recognized clinicopathologic entity that may occur as an isolated renal lesion or as part of a multisystem disorder. It is characterized by plasma cell-rich interstitial nephritis with abundant IgG4-positive plasma cells and IgG-dominant tubulointerstitial immune deposits. We report the first case of IgG4-related tubulointerstitial nephritis with multifocal plasma cell-rich renal arteritis presenting as acute kidney injury in a 72-year-old man. Seven weeks of prednisone therapy led to nearly complete recovery of kidney function. This case enlarges the morphologic spectrum of this disorder and emphasizes the need to distinguish it from other causes of renal vasculitis.
authors.affiliation: Department of Pathology of Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA. drshreegopal@gmail.com
authors.forename: Shree G
authors.initials: SG
authors.lastname: Sharma
authors.forename: Horia L
authors.initials: HL
authors.lastname: Vlase
authors.forename: Vivette D
authors.initials: VD
authors.lastname: D'Agati
mesh_terms: D000368:Aged; D001167:Arteritis / Q000150:complications* / Q000473:pathology; D006801:Humans; D006942:Hypergammaglobulinemia / Q000150:complications / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology*; D007678:Kidney Glomerulus / Q000473:pathology; D007684:Kidney Tubules / Q000000981:diagnostic imaging; D008297:Male; D009395:Nephritis, Interstitial / Q000150:complications* / Q000188:drug therapy / Q000276:immunology*; D011241:Prednisone / Q000627:therapeutic use; D014463:Ultrasonography
chemical_list: D007074:Immunoglobulin G; D011241:Prednisone