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下咽腔狭窄是喉癌病人喉切除和放射治疗后的常见并发症。作者们复习华盛顿大学医学院附属医院1978~1979年中28例全喉切除病人下咽腔狭窄的发病率,在有局部并发痘的21例中,12例发生下咽腔狭窄。病变在梨状窝者比病变在声门、声门上者的下咽腔狭窄发生率为高(P=0.002)。T分期对下咽腔狭窄的发生无统计学意义(P=0.1),而N分期则相反,N_0期大多无并发症,N_2和N_3期则下咽腔狭窄的发生率较高(P<0.01)。所有病人都进行了术前或术后放疗,剂量为4,500~6,500拉德。Dedo认为术前放疗超过3,000拉德即可发生狭窄。关于放疗能引起并发症业已得到公认,最近的论点集中在术前或术后放疗。从本组病例中发现术后放疗者42%发生了下咽腔狭
Hypopharyngeal stenosis is a common complication after laryngectomy and radiation therapy in patients with laryngeal cancer. The authors reviewed the incidence of hypopharyngeal stenosis in 28 patients with total laryngectomy in the affiliated hospital of Washington University School of Medicine from 1978 to 1979. Of the 21 patients with localized concurrent pox, 12 had hypopharyngeal stenosis. There was a higher incidence of hypopharyngeal stenosis in the pear-shaped fossa than in those with glottis and glottis (P=0.002). T-stage had no statistical significance in the occurrence of hypopharyngeal stenosis (P=0.1), while N stage was the opposite. N_0 stage was mostly uncomplicated, and N_2 and N_3 had a higher incidence of hypopharyngeal stenosis (P<0.01). ). All patients underwent preoperative or postoperative radiotherapy at a dose of 4,500 to 6,500 rads. Dedo believes that narrowing occurs when preoperative radiotherapy exceeds 3,000 rads. It has been recognized that radiotherapy can cause complications, and recent arguments have focused on preoperative or postoperative radiotherapy. 42% of postoperative radiotherapy patients in this group had hypopharyngeal cavity