Reversible Hearing Impairment Due to Inferior Colliculi Compression by a Pineal Glial Cyst

DOI Web Site 参考文献14件
  • MIZOBUCHI Yoshifumi
    Department of Neurosurgery, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Tokushima, Japan
  • SHIMADA Aki
    Department of Otolaryngology, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Tokushima, Japan
  • NAKAJIMA Kohei
    Department of Neurosurgery, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Tokushima, Japan
  • KAGUSA Hiroshi
    Department of Neurosurgery, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Tokushima, Japan
  • TAKAGI Yasushi
    Department of Neurosurgery, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Tokushima, Japan

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<p>Pineal glial cysts associated with bilateral hearing impairment are very rare. Here, we present the case of a 13-year-old boy with a pineal cyst, which caused severe bilateral hearing impairment persisting from 6 years of age. When the patient was 6 years old, the bilateral hearing acuity was about 40 dB on audiometry. Upon admission to our otolaryngology department, his audiogram revealed a bilateral worsening of the hearing acuity (80 dB). Magnetic resonance imaging (MRI) revealed an abnormal pineal cyst with tectal compression from the left with hardly normal bilateral brainstem auditory evoked potentials (BAEPs). We obtained informed consent for exploratory surgery and employed the right occipital transtentorial approach for pineal cyst removal. Based on histological examination, we diagnosed a glial cyst of the pineal gland. At 12 months postoperatively, the patient’s hearing improved, showing a bilateral hearing acuity of 40 dB on audiometry. Since the auditory pathway has both crossed and uncrossed fibers at the upper pons and midbrain level, compression at the lateral lemniscus or inferior colliculus level can cause bilateral hearing impairment. In the present case, there was a possible slow pineal cyst growth that eventually compressed the upper pons to the midbrain, lateral lemniscuses, or inferior colliculi from the left side, this eventually led to bilateral hearing impairment. These findings indicate that surgery can improve hearing acuity in patients with a pineal cyst associated with progressive hearing impairment.</p>

収録刊行物

  • NMC Case Report Journal

    NMC Case Report Journal 8 (1), 79-84, 2021

    一般社団法人 日本脳神経外科学会

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