Cerebrospinal fluid fistula: frequency in head injuries.

The authors present 11,074 patients with head trauma managed in the Xoco and Juarez Hospitals from Mexico City, from 1980 through 1990. They report a frequency of cerebrospinal fluid fistulas in 1.3% of head trauma: 55% were anterior fossa fistulas and 39% middle fossa fistulas. The most common symptoms and the treatment are presented.