Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
CASE REPORTS
Nephrotic-range Proteinuria and Interstitial Nephritis Associated with the Use of a Topical Loxoprofen Patch
Hiroaki Kikuchi, Makoto Aoyagi, Kiyotaka Nagahama, Yu Yajima, Chisato Yamamura, Yohei Arai, Suguru Hirasawa, Shota Aki, Naoto Inaba, Hiroyuki Tanaka, Teiichi Tamura
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Keywords: topical patch, nephrotic-range proteinuria, nonsteroidal anti-inflammatory drugs
JOURNAL OPEN ACCESS

2014 Volume 53 Issue 11 Pages 1131-1135

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Abstract

A 76-year-old woman with a history of lumbar fracture and marked proteinuria, bilateral pitting edema, malaise and pruritus was referred for an evaluation of an impaired renal function. A renal biopsy led to a tentative diagnosis of acute interstitial nephritis (AIN) with minimal change disease caused by nonsteroidal anti-inflammatory drugs (NSAIDs). Following the discontinuation of oral NSAIDs, the patient's symptoms disappeared spontaneously. However, nephrotic-range proteinuria relapsed one month after discharge, following loxoprofen patch use. The withdrawal of the topical loxoprofen patches once again resulted in the disappearance of all symptoms. This is the first case report of nephrotic-range proteinuria and AIN secondary to topical NSAID patch use.

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© 2014 by The Japanese Society of Internal Medicine
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