目的 探讨不同前纵隔病变的CT 特征性表现特点及CT诊断价值。方法 选 取我院于2012年3月-2014年2月收治的39 例病理诊断确诊前纵隔病变患者为研究 对象,均予以病理检查及CT影像学检查， 记录相关检查结果，以病理检查结果为 “金标准”评估CT诊断的准确性、特异 性、敏感性，记录漏诊率及误诊率。 结果 此次入组的39例患者病理检测结 果显示确诊良性病变共33例(84.6%)， 其中胸腺瘤19例(48.7%)，畸胎瘤11例 (28.2%),纵膈淋巴瘤3例(7.7%)；确诊 恶性病变共6例(15.4%)，其中胸腺瘤 3例(7.7%)，畸胎瘤2例(5.1%)，纵膈 淋巴瘤1例(2.6%)；以病理检测结果为 “金标准”评估CT检测准确性，显示 CT正确诊断恶性病变4例，良性病变32 例，其中假阴性2例，假阳性0例，诊 断准确性为92.3%(36/39)，特异性为 97.0%(32/33)，敏感性为66.7%(4/6)， 漏诊率为0.0%(0/39)，误诊率为 7.7%(3/39)。结论 CT检查能有效提升 前纵隔病变患者术前诊断准确性及有效 性，可作为重要辅助诊断手段应用于临 床诊疗中，以此缩短诊疗时间，提高诊 疗效率。

Objective To investigatethe features of CT characteristic manifestations and CT diagnosis of different anterior mediastinal lesions. Methods 39 cases ofpatients with anterior mediastinal lesionscomfirmed bypathological diagnosis who were admitted intothe hospital from March 2012 to February 2014 were selected as the research object and all of themwere given pathological examination and CTimageological examination. Therelated inspection results were recorded. Taking the results of pathological examinationas the gold standard, the accuracy, specificity and sensitivity of CT diagnosis were evaluated and the rates ofmissed diagnosis and misdiagnosis were recorded. Results Among the enrolled 39 patients, there were 33 cases (84.6%) ofbenign lesionsshowed byresults of pathological examination, including 19 cases of thymoma (48.7%), 11 cases of teratoma (28.2%) and 3 cases of mediastinal lymphoma (7.7%). 6 cases wereconfirmed of malignant lesions (15.4%), including 3 cases of thymoma (7.7%), 2 cases of teratoma (5.1%) anda case of mediastinal lymphoma (2.6%). Taking the results of pathological examinationas the gold standard, the accuracy of CT was detected, which showed that there were 4 cases of malignant lesions correctly diagnosed by CT and 32 cases of benign lesions, which included 2 false negative cases and no false positive case. Theaccuracyof the diagnosis was 92.3% (36/39), the specificity 97.0% (32/33), the sensitivity 66.7% (4/6), the rate of missed diagnosis 0% (0/39) and therate of misdiagnosis 7.7% (3/39). Conclusion CT examination can effectively enhancethe accuracy and effectiveness ofpreoperative diagnosis of patients withanteriormediastinal lesions, which can beused in clinical diagnosis and treatmentas an important auxiliary diagnostic methodto shorten the consultation hours and improve the efficiency of diagnosis and treatment.