• K Yamakawa, N Shitara, S Genka, S Manaka, and K Takakura.
• Department of Neurosurgery, University of Tokyo Hospital, Japan.
• Neurosurgery. 1989 Apr 1; 24 (4): 568-73.

AbstractThirty-three cases of intracranial epidermoid tumors treated during the past 25 years were analyzed with regard to clinical manifestations, recurrence rates related to the extent of surgery, and long-term survival rates. Epidermoid tumors caused various symptoms, especially in the cerebellopontine angle (15 cases), of which a transient remission of symptoms was observed in 4 cases (23.5%). The average time from initial symptoms to surgery was much shorter in suprasellar region and third ventricular locations (average of 11 months) than in other locations (average of 7 years). In 28 patients (84.9%), the tumor was removed totally or subtotally. Most of the patients could lead an independent and useful life after operation (93.1%). Among the 29 patients in a long-term follow-up survey, seven tumors recurred after an average interval of 8 years and 10 months (from the first to second operation) and 12 years and 6 months (from the second to third operation). Patients with recurrent tumors were successfully treated, and excellent functional prognosis was observed even after the second or third operation. The 20-year survival rate was 92.8% (Kaplan-Meier method).

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