Lipoma in the Cerebellopontine Angle <I>—Case Report—</I>

Shigeru NISHIZAWA; Tetsuo YOKOYAMA; Seiji OHTA; Hiroshi RYU; Toshiaki NINCHOJI; Ichiro SHIMOYAMA; Seiji YAMAMOTO; Yasushi SUGIURA; Kenichi UEMURA; Michihiko NOZUE

doi:10.2176/nmc.30.137

Lipoma in the Cerebellopontine Angle

—Case Report—

Shigeru NISHIZAWA, Tetsuo YOKOYAMA, Seiji OHTA, Hiroshi RYU, Toshiaki NINCHOJI, Ichiro SHIMOYAMA, Seiji YAMAMOTO, Yasushi SUGIURA, Kenichi UEMURA, Michihiko NOZUE

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Keywords: cerebellopontine angle tumor, lipoma, hamartoma, auditory brainstem response

JOURNAL FREE ACCESS

1990 Volume 30 Issue 2 Pages 137-142

DOI https://doi.org/10.2176/nmc.30.137

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Abstract

The authors report a case of a cerebellopontine (CP) angle lipoma with a very unusual histological appearance. The 38-year-old male patient suffered vertigo, left tinnitus, and left hearing disturbance. Computed tomography and magnetic resonance imaging showed a nonenhanced low-density area and a high-intensity region in the left CP angle, respectively. The tumor, which was only partially removed because of its tight adhesion to the VIIIth nerve and brainstem, consisted of mature lipocytes and contained a piece of cartilage, which is highly unusual.

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