title: Isolated Hypertrophic Neuropathy of the Oculomotor Nerve.
abstract: BACKGROUND
  Hypertrophic neuropathy is a rare entity commonly associated with peripheral nerve, characterized by onion bulb formations. Its cranial nerve involvement is very rare; only 7 cases have been found in the literature.
  
  
  METHODS
  A 32-year-old white man with a 5-year history of intermittent right retro-orbital headache and mild right ptosis presented to the Neurosurgery Clinic. A magnetic resonance imaging of his brain demonstrated an enhancing lesion associated with the right third nerve. He underwent biopsy of the lesion, and its pathology report confirmed the diagnosis of hypertrophic neuropathy. Within 4 months, his third nerve palsy had completely resolved and was functioning fully.
  
  
  CONCLUSIONS
  Here, we report a first case of isolated hypertrophic neuropathy involving the oculomotor nerve.
authors.affiliation: Department of Neurosurgery, University of Minnesota, Minneapolis, Minnesota, USA. Electronic address: limxx132@umn.edu.
authors.forename: Joshua J
authors.initials: JJ
authors.lastname: Lim
authors.affiliation: Department of Neurosurgery, University of Minnesota, Minneapolis, Minnesota, USA; Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, USA.
authors.forename: H Brent
authors.initials: HB
authors.lastname: Clark
authors.affiliation: Department of Neurosurgery, University of Minnesota, Minneapolis, Minnesota, USA.
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Grande
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging; D003399:Craniotomy; D006261:Headache / Q000209:etiology; D006801:Humans; D006984:Hypertrophy; D008279:Magnetic Resonance Imaging; D008297:Male; D009802:Oculomotor Nerve / Q000000981:diagnostic imaging / Q000473:pathology*; D015840:Oculomotor Nerve Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D017397:Prefrontal Cortex / Q000601:surgery
keywords: Cranial nerve; Hypertrophic neuropathy; Oculomotor nerve; Onion bulb