Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
CASE REPORTS
RS3PE Syndrome with Iliopsoas Bursitis Distinguished from an Iliopsoas Abscess Using a CT-guided Puncture
Shoichi FukuiNaoki IwamotoSosuke TsujiMasataka UmedaAyako NishinoYoshikazu NakashimaTakahisa SuzukiYoshiro HoraiTomohiro KogaShin-ya KawashiriKunihiro IchinoseYasuko HiraiMami TamaiHideki NakamuraTomoki OriguchiAtsushi Kawakami
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JOURNAL OPEN ACCESS

2015 Volume 54 Issue 13 Pages 1653-1656

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Abstract

A 55-year-old man was diagnosed with remitting seronegative symmetrical synovitis with pitting edema (RS3PE) syndrome. Contrast-enhanced computed tomography for cancer screening showed a mass with low-density centers with an enhanced rim in the left iliopsoas muscle. We suspected an iliopsoas abscess and performed computed-tomography-guided puncture of the mass. Both Gram staining and the culture of the fluid were negative. We diagnosed the patient with RS3PE syndrome with iliopsoas bursitis and administered low-dose corticosteroids without antibiotics. The symptoms, including left hip pain, quickly disappeared following treatment. Clinicians should be aware that iliopsoas bursitis may resemble an iliopsoas abscess. As a result, it is important to make an accurate differential diagnosis.

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© 2015 by The Japanese Society of Internal Medicine
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