Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
CASE REPORTS
IgG4-related Disease: A Mass Lesion in the Intrarenal Sinus near the Renal Pelvis
Jun-ichi Inenaga, Toshiharu Ueno, Masahiro Kawada, Aya Imafuku, Koki Mise, Keiichi Sumida, Rikako Hiramatsu, Eiko Hasegawa, Noriko Hayami, Tatsuya Suwabe, Junichi Hoshino, Naoki Sawa, Kenmei Takaichi, Takeshi Fujii, Kenichi Ohashi, Toshikazu Okaneya, Yoshifumi Ubara
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Keywords: IgG4-related disease, IgG4-related kidney disease, IgG4-related pyelitis, mass lesion in the intrarenal sinus
JOURNAL OPEN ACCESS

2015 Volume 54 Issue 15 Pages 1897-1900

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Abstract

A 52-year-old Japanese woman was admitted to our hospital with the renal pelvic mass lesion detected on a health screening examination. The surgical specimen contained a mass exhibiting the histological features of immunoglobulin (Ig)G4-related disease, including lymphoplasmacytic infiltration and sclerosis with numerous IgG4-producing plasma cells. Postoperatively, an elevation of the serum IgG4 level was confirmed at 403 mg/dL; however, there was no evidence of tubulointerstitial nephritis or glomerulopathy, including membranous nephropathy, and the urothelium of the renal pelvis was intact without inflammation. We herein report this case in which IgG4-related disease of the renal pelvic region presented with a mass lesion in the intrarenal sinus near the renal pelvis, not 'pyelitis' (as described by Stone).

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© 2015 by The Japanese Society of Internal Medicine
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