Middle cranial fossa approach for the repair of spontaneous cerebrospinal fluid otorrhoea using autologous bone pate.

Abstract

Tegmen plate defects causing cerebrospinal fluid (CSF) leaks and brain hernias have conventionally been repaired using soft tissue grafts by a transmastoid approach. A review of the literature reveals that the results of transmastoid repairs have been less than satisfactory. We present here four patients with spontaneous CSF otorrhoea who had tegmen defects repaired using the middle cranial fossa approach. An autologous bone pate slab mixed with fibrin glue with additional temporalis fascia reinforcement was used for the repairs. All four patients had uneventful postoperative periods and have had no subsequent CSF leak (follow-up range: 1-3 years). We believe that the middle cranial fossa approach is more effective than the transmastoid approach for the repair of CSF leaks and brain hernias through tegmen plate defects. An important additional benefit is hearing preservation. We also recommend the use of bone pate along with soft tissue for the repair in order to achieve a secure seal. Bone pate can effectively seal multiple defects in the tegmen plate without any risk of migration.