Anterior Transpetrosal Approach Combined with Partial Posterior Petrosectomy for XXXX with Posterior Extension.

@entity1 @entity75 @entity5 @entity5173 @entity1653 @entity393 @entity50
BACKGROUND: An anterior transpetrosal approach (ATPA) is suitable for treating @entity75 . However, the limit of the ATPA is reached when the @entity5 extends posterolaterally over the internal auditory canal (IAC) along the petrous edge. In such cases, ligation of the posterior part of the @entity50 ( @entity50 ) is necessary. To  overcome this limitation, we combined the ATPA with a partial posterior petrosectomy in 8 @entity1 who had @entity1653 extending posterolaterally over the IAC. METHODS: We resected only the Trautmann triangle in addition to the Kawase triangle to secure the space to ligate the posterior portion of the @entity50 . Because the tympanic cavity and bony labyrinth of the ear were not exposed, we were able to preserve hearing function and lower the risk of @entity5173 . Furthermore, this approach enables easy ligation of the @entity50 and the tentorium posterior to the @entity5 attachment. This combined technique also allows visualization of the petrosal vein, which is important for surgery of the posterior fossa. RESULTS: Total and near-total @entity5 removal was achieved in 6 @entity1 (75%) with no permanent complications and no @entity5173 . @entity393 was not found in any of the @entity1 who underwent this surgery. CONCLUSIONS: The ATPA combined with partial posterior petrosectomy is an effective method for removal of complicated @entity1653 that extend posterolaterally over the IAC along the petrous edge.
