Delayed appearance of posttraumatic cerebrospinal fluid fistula.

A case of CSF fistula, formed as a result of old fracture of the anterior cranial fossa, presented with recurrent meningitis and CSF rhinorrhea due to herniation of markedly dilated right frontal horn of lateral ventricle into the right ethmoid sinus through fractures of right frontal bone, cribriform plate of ethmoid and roof of orbit is reported. Attention was drawn to the CSF fistula only after recurrent meningitis and detailed imaging studies. Using a right frontal craniotomy approach, successful repair of the CSF fistula was performed and patient was discharged symptom-free.