Clinical and MRI risk factors predicting post-irradiation carotid blowout syndrome in patients with nasopharyngeal cancer.

Abstract

To explore the clinical and imaging features of nasopharyngeal cancer (NPC) complicated by acute carotid blowout syndrome (CBS), analyze the risk factors for CBS, and improve diagnostic vigilance for early intervention. This retrospective review was conducted between January 2003 and May 2023. Altogether, 49patients with post-irradiation NPC with CBS and 49patients without CBS as control group were enrolled. The condition of the patients when CBS occurred was reviewed. Patient characteristics of the CBS and control groups were compared, and binary logistic regression analysis was performed to identify risk factors for CBS. All patients in the CBS group were conscious, and 41patients had aKarnofsky performance assessment scale score of ≥ 70. After interventional therapy, 43patients survived (the mean survival time of patients after CBS was 3.2 ± 2.1years). Compared with the control group, the CBS group had ahigher incidence of sphenoid sinusitis (81% vs. 52.4%), osteonecrosis (82.9% vs. 51.2%), artery exposure (29.3% vs. 4.9%), and internal carotid artery injury (61% vs. 29.3%). Osteonecrosis and artery exposure were selected as important risk factor for CBS, with p-values of 0.016 and 0.031, respectively. CBS is an important factor that affects the survival of patients with NPC. If internal carotid artery injury, artery exposure, sphenoid sinusitis, and osteonecrosis are present, especially the latter two signs, the possibility of CBS should be considered.