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A Case of a Meningeal Carcinomatosis of the Internal Auditory Meatus
Treated as Sudden Deafness
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Fumiyuki Goto, Miki Arai, Takeshi Wakabayashi, Tomoko Otomo, Ryoto Nagai, Shuujiro Minami, Takanobu Shimada, Masato Fujii
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Res Vestib Sci. 2015;14(4):139-142.
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 Abstract
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- We describe a case of meningeal carcinomatosis of the internal auditory meatus
presenting as sudden deafness accompanied by dizziness. A 54-year-old woman
complained of acute right-side hearing loss in October 2014. The pure tone
audiometry test revealed right-side hearing loss of 47.5 dB. She was treated with
oral steroids. Her hearing as well as her symptoms of dizziness worsened and
she was admitted for further examination. Her right and left-side hearing had
worsened to 105.0 dB and 47.5 dB, respectively. A magnetic resonance imaging
scan of the head revealed bilateral enhancement of the internal auditory canal
and multiple brain metastases. The chest radiograph revealed a mass in the left
lung. Adenocarcinoma of the lung was diagnosed. Lumbar puncture yielded no
evidence of carcinoma cells in the cerebrospinal fluid, but an increased number
of lymphocytes was confirmed. A diagnosis of multiple brain metastases and
leptomeningeal metastasis from the adenocarcinoma of the lung was considered.
Whole-brain radiation therapy (30 Gr/10 fractions) was administered. Progressive
bilateral hearing loss is a rare first manifestation of meningeal carcinomatosis.
It is quite important to consider the possibility of this condition when patients
present with sudden deafness.
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KBS
