侵袭性胸腺瘤的CT表现及病理对照

目的：分析侵袭性胸腺瘤的CT表现，评价CT对其临床分期的准确性。资料与方法：回顾分析32例经手术病理证实的侵袭性胸腺瘤的CT所见，通过对病变的密度、周围纵隔结构的侵犯、胸膜肿植以及纵隔外转移情况的观察进行分期，并和病理分期进行比较。结果：侵袭性胸腺瘤的CT表现主要有：分叶状或不规则肿块；密度不均匀；局灶性钙化；邻近结构的脂肪层消失；侵及心包、胸膜、肺及其他器官。CT对临床分期判断准确性为87．5％，特异性为90％，敏感性为83．3％。结论：CT对侵袭性胸腺瘤术前分期及病变范围的显示准确，对确定手术方案，评价治疗效果及判断复发具有重要意义。

CT Manifestations and Staging of Invasive Thymomas: A Comparison with Pathology

Objective To discuss CT manifestations of invasive thymomas, and to evaluate CT scan in staging the disease.Materials and Methods CT findings in 32 patients with pathologically proved invasive thymoma were retrospectively analyzed. The observation was focused on the lesion's density, involvement of adjacent mediastinal structures, pleural seeding, mediastinal lymphadenopathy and extra-mediastinal metastases. CT staging and a comparison with pathologic results were made.Results The main CT findings were as follows: lobulated or irregular-shaped mass with heterogeneous density and localized calcifications, disappearing of adjacent fat layer, and involvement of pericardium, pleura, lung and/or other organs. The staging accuracy, specificity and sensitivity by CT scans were 87.5%, 90.0% and 83.3%, respectively.Conclusion CT is of great value for invasive thymomas in making preoperative staging, displaying lesion's extent, planning surgical scheme, evaluating therapeutic results and detecting recurrence.