Objective To observe MRI manifestations of uterine carcinosarcomas(UCS).Methods A retrospective analysis included 23 patients with confirmed UCS by surgical pathology.Twenty patients underwent pelvic enhanced MRI scanning,while 3 patients underwent pelvic plain MRI scanning.MRI manifestations of UCS were analyzed.Results MRI findings in all patients showed uterine cavity dilation and the masses in the uterine cavity.MRI findings include 5 cases of pedunculated exophytic type,16 cases of broad-based exophytic type,and 2 cases of infiltrative growth.T1WI showed low signal in 11 cases and iso-intense signal in 12 cases,with 10 cases showing high signal on T1 WI.T2WI shows uniformly slightly high signal intensity,and in 7 cases,there were flow voids within the lesions on T2WI.DWI showed high signal in-tensity in all cases.ADC value of the solid component was(0.95±0.16)x 10-3mm2/s.Contrast-enhanced scans revealed mild enhancement in 6 cases,moderate enhancement in 10 cases,and significant enhancement in 4 cases.Conclusion UCS on MRI can present as a large intracavitary mass with heterogeneous signal intensity.It may sometimes be accompanied by flow voids,and the degree of enhancement is comparable to or higher than that of the uterine myometrium.
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