Prospective observational study of patients undergoing anterior petrosectomy
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Date
2019-12
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SCTIMST
Abstract
The anterior petrous apex has been considered as a gateway to the posterior
cranial fossa. The anterior petrosectomy as described by Kawase converts this deep
narrow operative corridors into wider shallower exposures, improves manoeuvrability
and minimizes retraction. It comprises of a sub-temporal craniotomy followed by
extradural drilling of the petrous apex to reach the posterior fossa. The traditional
Kawase approach provides a 10×5 mm fenestration at the petrous apex of the
temporal bone between the 5th cranial nerve and internal auditory canal and the
greater superficial petrosal nerve. Complications of this approach include palsies of
facial, trigeminal and abducent nerve, CSF leak, hearing loss, injury to the vein of
Labbe, etc. This study aims to calculate the amount of bone resected in an anterior
petrosectomy done in this institute and with this knowledge, quantify the differential
variations used in each surgery while achieving adequate exposure with respect to the
local complications will provide a better understanding of this approach. The study
ought to define minimal safe resection for a lesion with the best local outcome while
preserving the adequacy of exposure