Hello,
I found the following under the lay terms for 61591.
This code is reported for a surgical approach procedure during which the physician accesses the middle cranial fossa using an infratemporal (below the temporal fossa) pre–auricular (in front of the external ear) approach, sometimes called the transparotid approach, to expose a lesion or defect at the base of the skull. The approach can also include a mastoidectomy, resection of the sigmoid sinus and/or decompression/mobilization of the auditory canal or petrous carotid artery. The selection of a particular approach will depend on the location and size of the lesion. Report other surgeries, repairs or reconstructions separately.
Clinical Responsibility
The physician utilizes infratemporal fossa or area behind the auricle of ear to access the hollow region (bounded by sphenoid and temporal bones) containing tissue defect. Multiple techniques like removal of the mastoid portion of posterior temporal bone and sigmoid sinus, stretching (with preservation) of seventh cranial nerve and petrous segment of internal carotid artery, and release of pressure from ear canal (external auditory meatus, external acoustic meatus) may be performed to access the diseased tissue.
