SWS of Leiomyoma with Red Degeneration
Takeuchi, Mayumi Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Bando, Yoshimi Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
susceptibility-weighted magnetic resonance sequence
Purpose: Red degeneration of uterine leiomyoma (RDL) is a hemorrhagic infarction caused by peripheral venous thrombosis. The peripheral high-intensity rim on T1-weighted MRI is characteristic for RDL; however, it may not be observed at all the phases of RDL. Susceptibility-weighted MR sequences (SWS) have exquisite sensitivity to blood products, and we hypothesized that the low-intensity rim due to the T2* shortening effects of blood products may be more clearly demonstrated on SWS. The purpose of this study is to evaluate the capability of SWS for the diagnosis of RDL.
Methods: Surgically proven 15 RDL, which showed suggestive MRI findings (high-intensity rim or entirely high signal intensity on T1-weighted imaging) were retrospectively evaluated. MRI was qualitatively evaluated for the presence of high-intensity rim around a mass on fat-saturated T1-weighted images, and low-intensity rim on T2-weighted images and on SWS (susceptibility-weighted imaging [SWI] or T2-star-weighted angiography [SWAN]).
Results: The high-intensity rim on T1-weighted images, low-intensity rim on T2-weighted images and on SWS were observed in 47%, 47%, and 100% of RDL, respectively. The other 53% of lesions showed entirely high signal intensity on T1-weighted images. Pathological examination revealed coagulative necrosis in all 15 lesions.
Conclusion: SWS may be helpful for the diagnosis of RDL by revealing characteristic peripheral low-intensity rim.
Magnetic Resonance in Medical Sciences
Japanese Society for Magnetic Resonance in Medicine
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives International License(https://creativecommons.org/licenses/by-nc-nd/4.0/).
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