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A Rare Inner Ear Malformation With Sensorineural Hearing Loss

Tatsuo Kono, MD; Shigeko Kuwashima, MD; Hiroaki Arakawa, MD; Erena Yamazaki, MD; Kazuhiro Kitajima, MD; Yasuo Ejima, MD; Tsutomu Ishikawa, MD; Teisuke Hashimoto, MD; Yasushi Kaji, MD

Arch Otolaryngol Head Neck Surg. 2009;135(10):1048-1051.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

INTRODUCTION

A narrow duplicated internal auditory canal (IAC) is a very rare congenital inner ear malformation, with only 5 cases (to our knowledge) reported in the literature.^1-5 A 14-year-old girl with unilateral sensorineural hearing loss (SNHL) showed 2 narrow (<1 mm) bony canals in the inner ear portion of the left temporal bone on computed tomograms (CTs). The anterior canal continued to the bony canal of the facial nerve, and the posterior canal continued to the cochlea. Other than a lack of development of the canal for the cochlear nerve, the cochlea was normal. High-resolution magnetic resonance images (MRIs) revealed a single thin cranial nerve located in the anterior canal. However, a cranial nerve was not found in the posterior canal. Therefore, a diagnosis . . . [Full Text of this Article]

REPORT OF A CASE

COMMENT

AUTHOR INFORMATION

Author Affiliations: Department of Radiology, Dokkyo Medical University School of Medicine, Tochigi, Japan.

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