恶性胸腺瘤的CT诊断

CT Dignosis of Malignant Thymoma

目的 探讨ＣＴ对恶性胸腺瘤的诊断鉴别诊断。方法分析１９例经手术病理证实的恶性胸腺瘤的ＣＴ表现，并根据侵袭性胸腺瘤（Ｉ型）和胸腺癌（Ⅱ型）的分型，作对比分析。结果恶性胸腺瘤沿纵轴爬行生长，易侵犯邻近器官，形态不规则，肿瘤密度不均匀等。Ⅱ型易纵隔淋巴结及胸外转移，Ｉ型可合并自身免疫疾病及胸膜种植。结论ＣＴ扫描对恶性胸腺瘤的诊断和分型具有辅助价值。

Objective :TO study CT dignosis of malignant thymoma. Methods CT scanned cases of malignant thymoma confirmed by surgery and pathology were reviewed and analyzed. The difference between 15 cases of invasie thymoma(Type I ) and 4 cases of thyrmic cnacer(Type Ⅱ ) were also studied. Results Heterogeneous density and irregular invasion to adjacent organs were found in most patients. Extramediastinal metastasis was found in type Ⅱ patients, while it was not found in type I patients. Conclusion CT scanning is of value both in routine and differential diagnosis of malignant thymoma