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Reversible hyposmia caused by intracranial tumour

Published online by Cambridge University Press:  29 June 2007

Tadashi Ishimaru ,
Takaki Miwa ,
Motohiro Nomura ,
Masayuki Iwato  and
Mrrusuru Furukawa
Tadashi Ishimaru*
Affiliation:
Department of OtorhinolaryngologySchool of Medicine, Kanazawa University, Japan.
Takaki Miwa
Affiliation:
Department of OtorhinolaryngologySchool of Medicine, Kanazawa University, Japan.
Motohiro Nomura
Affiliation:
Department of Neurosurgery, School of Medicine, Kanazawa University, Japan.
Masayuki Iwato
Affiliation:
Department of Neurosurgery, School of Medicine, Kanazawa University, Japan.
Mrrusuru Furukawa
Affiliation:
Department of OtorhinolaryngologySchool of Medicine, Kanazawa University, Japan.
*
Address for correspondence: Tadashi Ishimaru, Department of Otorhinolaryngology, School of Medicine, Kanazawa University, 13–1, Takara-machi, Kanazawa, 920–8641Japan. Fax: +81 76 234 4265 e-mail: [email protected]
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Abstract

Two patients with hyposmia caused by an intracranial tumour recovered olfactory functions after craniotomy. The first case was a 68-year-old male with a tumour metastasized from the lung to the right frontal lobe. The second case was a 75-year-old male with meningioma of the right frontal lobe. Results of T & T olfactometry and venous olfaction tests also indicated suspected central hyposmia. Magnetic resonance imaging (MRI) indicated compression of the frontal lobe by intracranial tumour. Pressure on the olfactory centre located in the frontal lobe produced hyposmia. Decompression of the frontal lobe by craniotomy improved the sense of smell. Therefore, some cases of olfactory disturbance caused by intracranial tumour may be reversible if they are the result of simple compression of the olfactory centre.

Keywords

SmellOlfactory pathwaysBrain neoplasms
Type
Clinical Records
Information
The Journal of Laryngology & Otology , Volume 113 , Issue 8 , August 1999 , pp. 750 - 753
Copyright
Copyright © JLO (1984) Limited 1999

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