Magnetic Resonance Imaging Findings of Ischiofemoral Impingement in Patients With Inflammatory Myositis: An Observational Study

Robert M. Kwee, Shivani Ahlawat, Jan Fritz

Research output: Contribution to journalArticlepeer-review

Abstract

OBJECTIVE: To determine the frequency of magnetic resonance imaging (MRI) findings of ischiofemoral impingement (IFI) in patients with inflammatory myositis (IM) and associated factors. METHODS: Pelvis and thigh MRI studies of 314 consecutive patients (57% women; mean age, 55.5 years; range, 18–85) with suspected muscle disease were reviewed. RESULTS: Ischiofemoral impingement at MRI was present in 11% of patients with a final diagnosis of IM and in 2% of patients with an alternative diagnosis (P = 0.008). In multiple logistic regression analysis, IM, but not age or sex, was independently associated with IFI at MRI (odds ratio, 5.18; 95% confidence interval, 1.19–22.6; P = 0.028). Fatty atrophy of hip stabilizing muscles was independently associated with IFI at MRI (odds ratio per unit increase of fatty atrophy score, 1.03; 95% confidence interval, 1.01–1.05; P = 0.0007). CONCLUSIONS: Magnetic resonance imaging findings of IFI are present in 11% of IM patients and are independently associated with fatty atrophy of hip stabilizing muscles.

Original languageEnglish (US)
JournalJournal of Computer Assisted Tomography
DOIs
StateAccepted/In press - Oct 18 2016

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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