[Surgical approach of transnasal endoscopic resection of benign lesions in the paramedian lateral skull base].

To investigate the surgical approach of transnasal endoscopic resection of benign lesions in the paramedian lateral skull base. Retrospectively analyze 40 cases of the clinical data of patients with benign lesions of the skull base from August 2018 to February 2021 with transnasal endoscopic surgery, including 9 cases of cholesteatoma, 6 cases of hemangioma, 1 case of hemangiopericytoma, 6 cases of schwannoma, 15 cases of sphenoid sinus lateral crypt meningocele and cerebrospinal fluid leak, 3 cases of nasopharyngeal carcinoma bone inflammation after radiotherapy. All patients underwent transnasal endoscopic surgery, and different surgical approaches were selected according to the lesion location. The total resection rate was 100% in 40 patients. One patient had cerebrospinal fluid rhinorrhea, which was cured after repair. During the follow-up period of 3-30 months, 39 patients had different degrees of numbness in the maxillary or mandibular region, and the numbness disappeared from 2 weeks to 6 months; one patient with schwannoma still had numbness on one side of the upper lip one year after surgery. Transnasal endoscopic resection of benign lesions in the paramedian skull base has a high surgical safety and cure rate. The surgical approach selection mainly focuses on the pterygoid process and extends to the periphery. The shortest and least damaging approach should be selected according to the lesion location, and the endoscopic approach should also be selected according to the surgeon's expertise.