Manifestation of MRI findings and pathologic correlative analysis of the ovarian dysgerminoma
LIU Xuming1, YAN Zhihan2, CHEN Yanmei3, QIU Qiande1.
1.Department of Radiology, the Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, 325000; 2.Department of Radiology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027; 3.Department of Pathology, the Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou, 325000
LIU Xuming,YAN Zhihan,CHEN Yanmei, et al. Manifestation of MRI findings and pathologic correlative analysis of the ovarian dysgerminoma[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2016, 46(2): 133-136.
Abstract：Objective: To explore the manifestation of MRI features of ovarian dysgerminoma. Methods: The clinical pathologic data and MRI findings in 13 patients with ovarian dysgerminoma confirmed by operation and pathologic examination were retrospectively analysed. The size, shape, density, signal, boundary, strengthen and the changes of the adjacent structure of the mass were observed. Results: The largest diameter in 8 cases was longer than 10 cm, and 10 cases showed lobulated in shape with clear boundary and intact capsule (n=8). The tumor mainly appeared as solid masses in shape with necrosis and cystic lesions (n=2). Many signal voids of vessel in tumors were observed in three cases. The tumor mainly showed long T1 and long T2 signal on MRI, slightly high signal on DWI maps, and slightly low signal on ADC maps. The signal were mainly uniform. Nine cases with low signal fiber interval in tumor, and the tumor were divided into nodulars by the fiber interval. The higher signal nodular shadows were observed in the tumor in five cases with low signal fiber interval. The tumor were mainly enhanced slightly in the arterial phase after the administration of Gd-DTPA, with a feature of “slowly coming into and slowly going out”. Many circuitous blood vessels were significantly enhanced in the venous phase. Conclusion: The ovarian dysgerminoma has certain MRI characteristics, and the tumor, the intratumoral low signal hyperdensity and nodules separated by the hyperdensity are helpful to the qualitative diagnosis of ovarian dysgerminoma.
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