MRI and clinicopathological analysis of ovarian immature teratoma
1. Department of Radiology, Affiliated Suzhou Hospital, Nanjing Medical University, Suzhou Jiangsu 215002, China;
2. Department of Radiology, the Second Affiliated Hospital of Soochow University, Suzhou Jiangsu 215004, China
Abstract：Objective: To investigate the MR findings of ovarian immature teratoma and to correlate MR findings with pathological grading and clinical staging. Materials and Methods: The MR findings and pathology results of nine cases with pathologically proven immature teratoma were analyzed retrospectively. Comparisons between the MR findings and pathological grades and FIGO stages were evaluated by Spearman rank-order correlation. Results: On MR images all lesions appeared to be fat-containing tumors with solid components consisting of numerous cysts. According to the relative volume of solid components, the MR findings of the ovarian immature teratoma can be divided into three types: predominant fluid components(2 cases), mixed with fluid and solid components(5 cases) and predominant solid components(2 cases). The solid components showed heterogeneous signal intensity on MR images, containing numerous long T1 and long T2 signal of cystic area of various sizes. Scattered short T1, long T2 signal of fat foci and long T1, short T2 signal of calcifications were identified in all lesions. The solid components revealed significant contrast enhancement with reticular form. The fluid content exhibited signal intensities similar to simple fluid. The correlation coefficient of Spearman of the MR types and pathological grades was 0.3 and the correlation coefficient of the MR types and FIGO stages was 0.216, the differences were all not statistically significant(P＞0.05). Conclusion: The MR findings of ovarian immature teratoma have some characteristics. There are no significant correlation between the MR types and pathologic grades, and between the MR types and FIGO stages.
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