Extended phenotype in the transthyretin Tyr77 familial amyloid polyneuropathy

Eur Neurol. 2005;53(2):55-9. doi: 10.1159/000084299. Epub 2005 Mar 7.

Abstract

The transthyretin Tyr77 variant of familial amyloid polyneuropathy (FAP) has been identified in a few North American and European patients, but the full spectrum of its clinical manifestations is still not known. We report a 3-generation family of Jewish-Yemenite origin with Tyr77 FAP presenting with atypical features. The affected individuals had sensorimotor and autonomic neuropathy and cardiomyopathy accompanied by prominent dysphagia, hearing loss and asymptomatic carpal tunnel syndrome. Brain MRI in the proband showed multifocal white matter lesions. These features extend the reported Tyr77 phenotype and support the modifying effect of additional factors on the disease expression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amyloid Neuropathies, Familial / genetics*
  • Amyloid Neuropathies, Familial / pathology*
  • Amyloid Neuropathies, Familial / physiopathology
  • Brain / pathology
  • Electrophysiology
  • Female
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Middle Aged
  • Neural Conduction
  • Pedigree
  • Phenotype*
  • Polymerase Chain Reaction
  • Prealbumin / genetics*
  • Sural Nerve / pathology

Substances

  • Prealbumin