Hyposmia: a possible biomarker of Parkinson's disease

Neurosci Bull. 2014 Feb;30(1):134-40. doi: 10.1007/s12264-013-1390-3. Epub 2013 Oct 17.


Hyposmia, identified as reduced sensitivity to odor, is a common non-motor symptom of Parkinson's disease (PD) that antedates the typical motor symptoms by several years. It occurs in ∼90% of early-stage cases of PD. In addition to the high prevalence, the occurrence of hyposmia may also predict a higher risk of PD. Investigations into hyposmia and its relationship with PD may help elucidate the underlying pathogenic mechanisms. This review provides an update of olfactory dysfunction in PD and its potential as a biomarker for this devastating disease.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Biomarkers
  • Humans
  • Olfaction Disorders / diagnosis*
  • Olfaction Disorders / etiology
  • Parkinson Disease / diagnosis*
  • Parkinson Disease / etiology


  • Biomarkers