胸腺瘤的CT诊断

目的评估CT诊断良恶性胸腺瘤的价值.材料和方法分析31例经外科和病理证实的胸腺瘤的CT表现.结果良性胸腺瘤10例,除1例与左肺动脉局部有粘连外,其余边界均清晰.侵袭性胸腺瘤12例,胸腺癌9例,除1例鳞癌外,CT均为不规则肿块,血管间隙均受侵,前者心包受侵8例,胸膜受侵7例,后者心包受侵5例,胸膜受侵5例,肺转移4例,双肾上腺转移1例,胸骨破坏1例.结论CT能准确鉴别良性恶性胸腺瘤,显示恶性胸腺瘤的浸润范围,并对侵袭性胸腺瘤和胸腺癌进行鉴别.

CT Diagnosis of Thymomas

Purpose: To evaluate the CT manifestations of benign and malignant thymomas. Materials and Methods: The CT apperances of 31 cases of thymomas confirmed by surgery and pathology were analysed. Results: There were 10 benign thymomas. All CT scans demonstrated the soft tissue mass with clear margin except one adhered to left pulmonary artery. Of 12 invasive thymomas and 9 thymic carcinomas, all CT scans demonstrated irregular masses, but one squamous carcinoma. Cardiovascular structures were all involved. Peri cardium was involved in 8, pleural invasion in 7 of invasive thymomas. Pericardium was involved in 5, pleural invasion in 5, lung in 4, metastase to both adrenals in 1, and sternum destruction in 1 of thymic carcinoma. Conclusion: CT can deferentiate benign from malignant thymomas, also demonstrate the extent of malignant thymomas, and distinguish invasive thymomas from thymic carcinomas.