Vol.97 No.2 contentsPRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 97 No. 2 February 2004
A Case of Neurilemoma in Glossal Muscle
Atsuyoshi Asahi, Satoshi Nonaka, Akihiro Katada,
Yuhki Komabayashi, Toshihiro Nagato, Hideyuki Ishii,
Yusuke Abe, Tatsuya Hayashi and Yasuaki Harabuchi
(Asahikawa Medical College)
Neurilemoma (Schwannoma) is a benign tumor originating from Schwann sheath. Although it often occurs in the head and neck regions, occurrences in an oral cavity are relatively rare. We have experienced a case of neurilemoma in the glossal muscle. A 13-year-old female patient complained of an intra-glossal tumor. A smooth, 2-cm, elastic hard mass without tenderness was palpable in the left side of her tongue. Ultrasound examination revealed a well-margined, low echoic area. The margin of the mass was rich in blood flow. On magnetic resonance imaging (MRI), the mass showed decreased signal on T1-weighted images and increased signal on T2-weighted images. Moreover, the mass was enhanced by gadolinium on T1-weighted images. The encapsulated mass was surgically removed, and the pathological diagnosis was neurilemoma (Antoni type AB). MRI examination may be useful in diagnosing this tumor.
Key words : neurilemmoma, Schwannoma