胸腺瘤的MRI诊断与评价（附24例报告）

目的：分析胸腺瘤的MRI表现并评价其价值。方法：24例胸腺瘤患者术前均行MRI检查，病理诊断恶性11例，良性13例，分析胸腺瘤的包膜、侵袭征象，形态、大小及信号。结果：良性组：30．7％有包膜、无侵袭征象，84．6％形态规则，肿块各径线的平均值为左右径46mm，前后径29mm，上下径60mm。恶性组：均无包膜，81．8％，有侵袭征象形态不规则，肿块各径线的平均值为左右径106mm，前后径60mm，上下径92mm，经统计处理以上各项P＜0．05，有显著性差异，肿瘤的信号在良、恶性组中无明显差异。结论：MRI能够显示胸腺瘤的部位，形态、大小、包膜及侵袭征象，在鉴别良恶性、选择治疗方法及估计预后方面发挥重要作用。

Thymoma MRI diagnosis and evaluation(report of 24 cases)

To study the MRI manifestation of thymoma and to evaluate it' s value. Methods The MRI features of 24 cases thymoma (11 malignancys and 13 benigns) confirmed by surgery and pathology were retrospectively analysed. Results The manifestation of benign group was: capsule 30. 7% , no invasion, regular margin 84. 6% . The average diameter of the masses was transverse diameter 46mm, anteroposterior diameter 29mm, supe-rio - inferior diameter 60mm. The manifestation of malignant group was: no capsule, invasion 81.8%, irregular margin 81.8%, The average diameter of masses was transverse diameter 106mm, anteroposterior diameter 60mm, superioinferior diameter 92mm. There was significance of difference in statistics between benign and malignant group (P < 0. 05), but the signal of thymoma were no significance of difference. Conclusion MRI can play an important role in assessing the feafures of thymoma, planning treatment and estimating prognosis.