A cerebrospinal fluid (CSF) leak following skull base surgery can lead to meningitis, impaired wound healing, and often requires re-operation and/or CSF diversion. Thirty-two patients underwent a presigmoid, transpetrosal approach to skull base aneurysms and tumors. A vascularized temporalis muscle flap was utilized during the closure of the initial skull base reconstruction in 18 of the 32 patients. A temporary CSF diversion was utilized in 23 of the 32 patients. A permanent shunt was placed in eight patients. One patient developed a postoperative CSF leak from the contralateral ear due to a congenital abnormality in the middle ear. Another patient, who did not have a vascularized temporalis muscle flap reconstruction, developed a postoperative CSF leak in the context of an operation for recurrent tumor and prior radiation treatment. CSF diversion and vascularized temporalis muscle flaps are effective in preventing the development of postoperative CSF leaks following petrosectomy.
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