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Morphology of a columellaform stapes

Published online by Cambridge University Press:  29 June 2007

C. Vande Maelea ,
P. Van Cauwenberge ,
P. Kluyskens  and
L. Vakaet
C. Vande Maelea*
Affiliation:
Laboratory of Anatomy and Embryology, University of Ghent
P. Van Cauwenberge
Affiliation:
Department of Otorhinolaryngology, University of Ghent.
P. Kluyskens
Affiliation:
Department of Otorhinolaryngology, University of Ghent.
L. Vakaet
Affiliation:
Laboratory of Anatomy and Embryology, University of Ghent
*
Dr. C. Vande Maele, M. D., Department of Otorhinolaryngology, University Hospital, De Pintelann, 185, B-9000 Ghent, Belgium.
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Abstract

A columellaform stapes found in male patient 18 years old with a conductive hearing loss, has been examined by SEM and light microscopy. The ossicle was smaller than a normal stapes. The head was linked to the base by a crural plate, probably formed by the fusion of the material of the two crura. Microscopy showed a slightly less interwoven structure of the fibrillar bone present mainly at the cranial aspect of the crural plate. Honeycomb-like bone was confined to the caudal part of the crural plate. Microscopy revealed a cavity in the centre of the stapes at the transition between the base and the plate. During surgery, a bony structure was found linking the posterior side of the head of the stapes to the pyramidal eminence. Post-operative audiograms revealed improved hearing with some residual conductive loss of about 10 dB. This case illustrates that a columellaform stapes may occur without forming part of a syndrome.

Type
Clinical Records
Information
The Journal of Laryngology & Otology , Volume 103 , Issue 1 , January 1989 , pp. 79 - 82
Copyright
Copyright © JLO (1984) Limited 1989

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