• A disorder characterized by involvement of the olfactory nerve (first cranial nerve).
  • A non-neoplastic or neoplastic disorder affecting the olfactory nerve (first cranial nerve).
  • Diseases of the first cranial (olfactory) nerve, which usually feature anosmia or other alterations in the sense of smell and taste. Anosmia may be associated with neoplasms; central nervous system infections; craniocerebral trauma; inherited conditions; toxins; metabolic diseases; tobacco abuse; and other conditions. (Adams et al., Principles of Neurology, 6th ed, pp229-31)