Abstract #0097

Sensitivity and Reproducibility of MRI Detection of Hourglass-Like Constrictions in Parsonage-Turner Syndrome

Clare Nimura¹, Darryl Sneag¹, Philip Colucci¹, Casey Urban², Tim Li³, Emily Pedrick¹, Joseph Feinberg⁴, Carlo Milani⁴, and Ek Tsoon Tan¹

¹Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, United States, ²Hand and Upper Extremity Service, Hospital for Special Surgery, New York, NY, United States, ³Weill Cornell Medical College, New York, NY, United States, ⁴Department of Physiatry, Hospital for Special Surgery, New York, NY, United States

Synopsis

Keywords: Neurography, Nerves, Parsonage-Turner syndrome; electromyographyA retrospective analysis of 123 patients diagnosed with Parsonage-Turner Syndrome (PTS; neuralgic amyotrophy) found that magnetic resonance neurography (MRN)-based detection of hourglass-like constrictions (HGCs) in affected nerves was 91.2-92.0% sensitive to electromyography-confirmed PTS. Post-hoc inter-rater reliability analysis revealed an inter-reliability of 91.3-94.3% for detection of HGCs. This retrospective study confirmed that MRN detection of HGCs is sensitive and reliable for diagnosing PTS and may be used as an objective diagnostic tool for the syndrome.

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