title: The electrodiagnostic natural history of parsonage-turner syndrome.
abstract: BACKGROUND
  Recovery from Parsonage-Turner syndrome (PTS) is generally favorable, although recovery times have been shown to vary, in part because there are no universally accepted outcome measures. In this study, we describe the electrodiagnostic natural history of this condition based on objective electrodiagnostic testing, and propose that complete electrodiagnostic recovery can be seen as early as 1 year.
  
  
  METHODS
  Twenty-six subjects with 29 affected nerves confirmed as PTS were followed every 3 months for electrodiagnostic testing, or until full reinnervation was confirmed.
  
  
  RESULTS
  Twenty-three cases (79.3%) demonstrated electrodiagnostic evidence of initial recovery at a mean of 5.8 months. Nine cases (31%) showed complete electrodiagnostic recovery at a mean of 1 year. When excluding cases with <1 year of follow-up, 52.9% achieved complete electrodiagnostic recovery.
  
  
  CONCLUSIONS
  In contrast to previous reports, full electrodiagnostic recovery of PTS was demonstrated at a mean of 1 year in > 50% of patients with longer term follow-up. Muscle Nerve 56: 737-743, 2017.
authors.affiliation: Department of Physiatry, Hospital for Special Surgery, 429 East 75th Street, Third Floor, New York, New York, 10021, USA.
authors.forename: Joseph H
authors.initials: JH
authors.lastname: Feinberg
authors.affiliation: Department of Physiatry, Hospital for Special Surgery, 429 East 75th Street, Third Floor, New York, New York, 10021, USA.
authors.forename: Elizabeth T
authors.initials: ET
authors.lastname: Nguyen
authors.affiliation: Department of Physiatry, Hospital for Special Surgery, 429 East 75th Street, Third Floor, New York, New York, 10021, USA.
authors.forename: Kwadwo
authors.initials: K
authors.lastname: Boachie-Adjei
authors.affiliation: Department of Physiatry, Hospital for Special Surgery, 429 East 75th Street, Third Floor, New York, New York, 10021, USA.
authors.forename: Caitlin
authors.initials: C
authors.lastname: Gribbin
authors.affiliation: Hand and Upper Extremity Surgery, Department of Orthopedics, Hospital for Special Surgery, New York, New York, USA.
authors.forename: Steve K
authors.initials: SK
authors.lastname: Lee
authors.affiliation: Hand and Upper Extremity Surgery, Department of Orthopedics, Hospital for Special Surgery, New York, New York, USA.
authors.forename: Aaron
authors.initials: A
authors.lastname: Daluiski
authors.affiliation: Hand and Upper Extremity Surgery, Department of Orthopedics, Hospital for Special Surgery, New York, New York, USA.
authors.forename: Scott W
authors.initials: SW
authors.lastname: Wolfe
mesh_terms: D000328:Adult; D000368:Aged; D020968:Brachial Plexus Neuritis / Q000175:diagnosis* / Q000503:physiopathology*; D004568:Electrodiagnosis / Q000379:methods / Q000639:trends; D004576:Electromyography / Q000379:methods / Q000639:trends*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D020127:Recovery of Function / Q000502:physiology*; D055815:Young Adult
keywords: Parsonage-Turner syndrome; brachial neuritis; idiopathic; neuralgic amyotrophy; plexopathy