Distinct MR features in scleroderma associated myopathy

Shivani Ahlawat, Julie Paik, Filippo Del Grande, Elias S. Paris, Parvinder Sujlana, Laura M. Fayad

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To compare the MRI features in patients with fibrosing [FM] versus non-fibrosing [NFM] systemic sclerosis [SSc]-associated myopathy. Methods: 10 patients with FM and 14 with NFM underwent bilateral thigh MRI [T1-weighted, STIR and DW/ADC mapping]. Three observers, blinded to histology evaluated 36 muscles per patient for presence of intramuscular edema, fascial edema, fatty replacement and atrophy and measured ADC values. Fisher's exact test and student’s t-test were used to compare MRI findings of FM [endomysial/ perimysial fibrosis] and NFM [necrosis/inflammation] on histology. Results: Intramuscular edema [p < 0.0001] and fascial edema [p = 0.07] were more common in FM. On DWI, elevated intramuscular signal was more common in FM, [low b-value: p < 0.0001 and high b-value: p < 0.0001]. On T1, NFM exhibited more fatty replacement [p = < 0.0001] and atrophy [p = < 0.0001]. Conclusions: Intramuscular and fascial edema on MRI are more common in SSc-associated FM, while markers of chronic muscle damage are more often associated with NFM.

Original languageEnglish (US)
JournalRadiologia Medica
DOIs
StateAccepted/In press - 2021

Keywords

  • Diffusion weighted imaging
  • Fibrosis
  • Magnetic resonance imaging
  • Myopathy
  • Scleroderma

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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