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  • Title: Anosmia following operation for cerebral aneurysms in the anterior circulation.
    Author: Eriksen KD, Bøge-Rasmussen T, Kruse-Larsen C.
    Journal: J Neurosurg; 1990 Jun; 72(6):864-5. PubMed ID: 2338570.
    Abstract:
    Damage to the olfactory nerve during frontotemporal approach to the basal cisternal region has not previously been investigated in a quantified manner. In this retrospective study of 25 patients operated on for ruptured intracranial aneurysms via the frontotemporal route, 22 patients suffered postoperatively from anosmia ipsilateral to the side of surgery. This complication most often goes unrecognized by the patient as well as the physician, and attention should be drawn to it because of its widespread occurrence. This investigation demonstrates a high incidence of anosmia (24 (88.9%) of 27 surgical sides) occurring ipsilateral to the frontotemporal approach in aneurysm surgery. Recovery after traumatic anosmia has been recorded up to 5 years after injury. Nevertheless, the authors believe that the damage is permanent when lasting 35 months or longer.
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