The study of CSF fistulae, and especially those involving otolaryngological anomalies, must be based on the search for the causative problem of recurrent meningitis. Congenital malformations, post-traumatic and post-operative situations or even diseases involving the cranial bones are basic causes that should be studied. Currently, cranial trauma is the most usual cause of CSF fistulae, with the possibility of recurrent bacterial meningitis.
recurrent bacterial meningites; fistulae; cerebrospinal fluid