目的 :探讨18F FDG正电子发射断层摄影术 (PET)在头颈部恶性肿瘤诊断中的价值。方法 :回顾性分析应用18F FDGPET检查的 75例头颈部肿瘤患者 (鼻咽癌 36例 ,食管癌 18例 ,甲状腺癌 13例 ,喉癌 6例 ,下咽癌 2例 )的临床资料 ,其18F FDGPET显像结果与病理结果进行比较 ,部分与CT、MRI比较。结果 :18F FDGPET显像结果与病理结果相符率极高 ,鼻咽癌的灵敏度为 91.30 % ,特异度为 76 .92 % ,准确率为 86 .11% ;食管癌的灵敏度为 10 0 .0 0 % ,特异度为 83.33% ,准确率为 94 .4 4 % ;甲状腺癌、喉癌和下咽癌的灵敏度、特异度及准确率均为 10 0 %。结论 :18F FDGPET在头颈部恶性肿瘤的诊断中具有明显的优势。 Objective: To investigate the value of 18F FDG positron emission tomography (PET) in the diagnosis of head and neck malignant tumors. Methods: The clinical data of 75 patients with head and neck cancer (36 cases of nasopharyngeal carcinoma, 18 cases of esophageal cancer, 13 cases of thyroid carcinoma, 6 cases of laryngeal carcinoma and 2 cases of hypopharyngeal carcinoma) were retrospectively analyzed. 18F FDGPET imaging results and pathological results were compared, some with CT, MRI comparison. Results: The 18F FDGPET imaging results were highly consistent with the pathological findings. The sensitivity of nasopharyngeal carcinoma was 91.30%, the specificity was 76.92% and the accuracy was 86.11%. The sensitivity of esophageal carcinoma was 100.0% %, The specificity was 83.33%, the accuracy rate was 94.44%. The sensitivity, specificity and accuracy of thyroid cancer, laryngeal cancer and hypopharyngeal cancer were all 100%. Conclusion: 18F FDGPET has obvious advantages in the diagnosis of head and neck malignant tumors.