[Endoscopic transoral resection the tumors of the higher position in parapharyngeal space: a retrospective case-control study].

To analysis the indication and security of the endoscopic resection of transoarl and pterygoid process approach of neoplasms in elevatus parapharyngeal space.A retrospective case-control study were carried out in 22 patients with parapharyngeal space tumors.In the observation group (11 patients), tumors were endoscopic resected by transoral and pterygoid process approach. Paired with 11 patients (control group) who underwent surgry by traditional approach. We compared the en bloc resection rate, the operation time, blood loss, postoperative hospital stay, complication rate between the two groups.In the observation group, the operation time, the blood loss and the postoperative hospital stay was (122.45±22.2)min, (97.26±13.75)ml, (4.09±1.22)d respectively. While in the control group, the operation time, the blood loss and the hospitalized days was (134.36±20.38)min, (213.64±63.99)ml, (5.10±0.99)d respectively. There were tumors that were block resection in both groups. In the observation group, there were a recurrence. Comparing the operation time, en bloc resection rate and postoperative hospital stay, there were no significant differences. There were differences in bloods loss between the two groups.The endoscopic transoral resection the tumors of the higher position in parapharyngeal space is safe, minimally invasive and feasible in selected cases, with a high local control rate and a low surgical complication rate.