中文摘要：

目的 研究CT在良恶性胸腺瘤诊断和鉴别诊断中的应用价值。方法 回顾性分析我院2010年3月至2015年9月24例恶性胸腺瘤患者和35例良性胸腺瘤患者临床病历资料,观察良恶性胸腺瘤患者CT征象,探讨其在诊断和鉴别诊断良恶性肿瘤中的应用价值。结果 CT对良恶性胸腺瘤的检出率均为100%,35例良性肿瘤均有完整包膜,边缘光滑,3例发生胸膜增厚。24例恶性胸腺瘤患者包膜均不完整,边缘粗糙,16例发生胸膜增厚和胸腔积液。低危组、高危组及胸腺癌组肿瘤大小、形态、纵隔脂肪层及密度比较,差异均具有统计学意义（P〈0.05）。结论 CT对良恶性肿瘤诊断灵敏度好,准确率高,在良恶性肿瘤及其亚型鉴别诊断中具有较高应用价值,对临床治疗方案的制定具有重要指导意义。

英文摘要：

Objective To study the CT in the diagnosis and differential diagnosis of benign and malignant thymoma application value..Methods Retrospective analysis in March 2010 to September 2015, 24 patients with malignant thyrnoma and 35 patients with benign thymoma clinical medical records, observation of patients with benign and malignant thymoma CT sigms, discusses its application in the diagnosis and differential diagnosis of benign and maligmant tumors. Results CT detection rate is 100% of benign and malignant thymoma, 35 cases of benign tumors were complete capsular, edge smooth, 3 cases of pleural thickening. 24 patients with malignant thymoma coated are incomplete, rough edges, 16 cases of pleural thickening and pleural effusion. Low-risk group, high-risk groups and thymic carcinoma tumor size, shape, the density of mediastinal fat layer and comparison, the differences were statistically significant （P〈0.05）. Conclusion CT for benign and malignant tumor diagnosis good sensitivity, high accuracy, in benign and malignant tumor and its subtypes, with a high application value in the differential diagnosis of clinical treatment for has important guiding significance.