Surgery of cerebellopontine angle epidermoid cysts: role of the widened retrolabyrinthine approach combined with endoscopy.

摘要: Abstract Objectives To evaluate the use of retrolabyrinthine approach (RLA) combined with endoscopy particular reference to preservation cranial nerve function and completeness excision in surgery epidermoid cysts. Methods A retrospective study was performed on a series 8 consecutive patients whom 7 have undergone surgery. Main outcome measures Measures include audiological neurological status preoperatively postoperatively, size lesion, surgical approach, excision, operative morbidity. Results The tumors were all large, ranging from 2 × 3 cm 6 cm. Presenting symptoms headache (75%), dysequilibrium (62%), trigeminal palsy (38%), abducens (25%), and, rarely, auditory symptoms. Seven underwent surgery, 5 by RLA, 1 translabyrinthine (TLA), transcochlear approach. Complete achieved patients. transtentorial cases (1 TLA). Endoscopy used cases. It allowed complete tumor excision. One case keratinous meningitis observed. Trigeminal returned normal Postoperative facial grade I III Hearing preserved as class A, B. In presenting preoperative initially aggravated before returning year postoperatively. RLA less invasive hearing 4 where it attempted. Tumor control appeared better than suboccipital Mortality postoperative morbidity also appear reduced. Conclusion should be considered standard for Extension this into TLA or will depend difficulties hearing.