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中国癌症防治杂志 ›› 2015, Vol. 7 ›› Issue (3): 162-166.doi: 10.3969/j.issn.1674-5671.2015.03.05

• 头颈部肿瘤影像专栏 • 上一篇    下一篇

MRI在喉癌及下咽癌术前T分期中的价值

  

  1. 广西医科大学第一附属医院放射学科
  • 出版日期:2015-06-25 发布日期:2015-07-13
  • 通讯作者: 李伟雄 liwx668@sina.com

MRI-based T staging of laryngeal and hypopharyngeal cancers

  • Online:2015-06-25 Published:2015-07-13

摘要:

目的 探讨MRI在喉癌及下咽癌术前T分期中的价值。方法 回顾性分析40例经手术病理证实的喉癌、下咽癌患者MRI图像,根据MRI表现对肿瘤进行T分期,并将MRI分期结果与手术病理检查结果相对照。结果 喉癌及下咽癌MRI表现为声带/咽壁增厚或软组织肿块形成。MRI诊断其侵犯周围结构的敏感性为95.4%(83/87),阳性预测值为89.2%(83/93),假阴性率为4.6%(4/87)。MRI对各期喉癌及下咽癌术前T分期的准确率分别是T1期 100%(1/1),T2 期80%(12/15),T3 期83.3%(5/6),T4 期100%(18/18),总准确率为90%(36/40),MRI术前T分期与病理分级的一致性具有统计学意义(K=0.843,P<0.05)。结论 MRI能准确地显示喉癌及下咽癌的部位、形态及侵犯范围,其术前T分期与病理分级一致性好,具有重要的诊断价值。

关键词:  喉肿瘤, 下咽部肿瘤, 磁共振成像, 分期

Abstract:

Objective  To assess the value of MRI for preoperative T staging of laryngeal and hypopharyngeal cancers. Methods The laryngeal or hypopharyngeal cancer of 40 patients with pathology-confirmed diagnoses were retrospectively analyzed and staged based on magnetic resonance images. MRI-based staging was compared with pathology-based staging. Results MRI of laryngeal and hypopharyngeal cancers showed vocal cord/pharyngeal wall thickening or the presence of a soft tissue mass. Sensitivity of MRI for assessing invasion was 95.4%(83/87) and positive predictive value was 89.2%(83/93),while the technique failed to detect 4.6% cases of invasion (4/87). The diagnostic accuracy of MRI for each preoperative T stage was 100%(1/1) for T1,80%(12/15) for T2:, 83.3%(5/6) for T3,and 100% (18/18) for T4. Overall accuracy was 90% (36/40). Paired test results showed Kappa=0.843(P<0.05), indicating good consistency between preoperative MRI staging and pathological staging. Conclusion MRI can reveal the location, shape and extension of laryngeal and hypopharyngeal tumors, suggesting usefulness in preoperative T staging.

Key words: Laryngeal neoplasm, Hypopharyngeal neoplasm, Magnetic resonance imaging (MRI), Staging