Dumbbell Glossopharyngeal Schwannoma at Jugular Foramen with Intrapetrosal Extension.

Kim, Chang Jin; Jung, Hee Won; Lee, Sun Ho; Cho, Byung Kyu; Sim, Bo Sung; Chi, Je G

Original Article

Journal of Korean Neurosurgical Society 1984;13(1): 167-174.

Chang Jin Kim, Hee Won Jung, Sun Ho Lee, Byung Kyu Cho, Bo Sung Sim, Je G Chi

¹Department of Neurosurgery, College of Medicine, Seoul National University, Seoul, Korea.
²Department of Pathology, College of Medicine, Seoul National University, Seoul, Korea.

ABSTRACT

Schwannomas arising from the cranial nerves of the jugular foramen are rare, only 50 cases including 15 glossopharyngeal schwannomas have been reported. They may be confused with the far more common acoustic schwannoma because of the presenting symptom of hearing loss. With the symptoms and signs of the lower cranial nerve involvement, the characteristic radiographic findings of enlarged jugular foramen and normal internal acoustic meatus can make the diagnosis. The authors review the literature and present a unique case of glossopharyngeal schwannoma which had intra-and extracranial growth with intrapetrosal extension.

Key Words: Glossopharyngeal schwannoma; Acoustic schwannoma; Hearing loss; Enlarged jugular foramen; Normal internal acoustic meatus