Korean J Otolaryngol-Head Neck Surg.  1998 Apr;41(4):454-460.

Neurotologic Analysis of Cerebellopontine Angle Tumor

• Lee YW
• Lee KD
• Yu TH
• Kim HK

Abstract

BACKGROUND AND OBJECTIVES: The authors performed seven removal operations cerebellopontine angle tumor, six of which were acoustic neuroma. The purpose of this research is to analyze different cases of cerebellopontine angle tumor, determine their clinical characteristics, and evaluate the efficacy of various surgical approaches.
MATERIALS AND METHODS
We performed neurotological analysis of both clinical characteristics and the results of each surgical approach for seven patients who have been treated for cerebellopontine angle tumor.
RESULTS
The most frequent symptom was the complaint of hearing disturbance, where the mean PTAs measured were 66 dB, and the mean speech discrimination score was 35%. The average size of tumors measured by MRI was 3.9 cm. The following surgical approaches were used: translabyrinthine in 4 cases, modified translabyrinthine in 2 cases, transcochlear in one case. Complete removal of the tumor was possible in six patients. Facial nerve was preserved anatomically in six patients, and hearing preservation was possible in one patient for whom we performed the modified translabyrinthine approach.
CONCLUSION
Early diagnosis and treatment is important in order to improve the facial nerve function after the operation. The modified translabyrinthine approach is worth performing for hearing preservation.

Keyword

Cerebellopontine angle tumor; Acoustic neuroma; Translabyrinthine approach; Modified translabyrinthine approach; Transcochlear approach

MeSH Terms

Cerebellopontine Angle*
Early Diagnosis
Facial Nerve
Hearing
Humans
Magnetic Resonance Imaging
Neuroma, Acoustic*
Speech Perception