Michael E Lazarus, Tyler B Larsen

Claw Hand in Parsonage Turner syndrome

An elderly patient with an extensive smoking history presented with acute severe right-hand pain and evolving weakness with patchy sensory deficit. He had minimal relief from multiple analgesics, gabapentin, and acupuncture. Motor deficits in his right-hand progressed. A nerve conduction study confirmed motor-predominant polyneuropathy and magnetic resonance imaging (MRI) of his C-spine and brachial plexus ruled out apical lung mass or other structural lesions. A positive GalNAc-GD1a ganglioside antibody (IgG) was noted. A diagnosis of immune mediated neuralgic amyotrophy or Parsonage-Turner Syndrome was made. Intravenous immune globulin (IVIG) was started with partial improvement in motor function, six months later. Although this patient did not have SARS-CoV-2 infection nor was he recently vaccinated, this case is of interest to hospital-based internists as the Covid pandemic has seen an increase in the in reported cases of neuralgic amyotrophy worldwide due to the virus itself as well as the associated COVID-19 vaccines.

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