Oral Poster Paper IIINTRODUCTION: Interhemispheric approach to anterior skull base pathology may cause damage to the olfactory nerve by traction with subsequent anosmia. This deficit may affect patient’s daily activities and work. We aim to find out the incidence of subjective anosmia after interhemispheric approach and possible influence to patient. METHOD: Patients with interhemispheric approach since 1999 were selected. Those who had impaired conscious status and had impaired olfactory function before operation were excluded. Subjective evaluation of anosmia and effect on daily living were assessed by telephone interview. RESULT: In progresspostprin