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Abstract #2522

MRI findings of uterine adenomatoid tumors including diffusion-weighted imaging with pathologic correlation

Mayumi Takeuchi1, Kenji Matsuzaki2, and Masafumi Harada1
1Department of Radiology, Tokushima University, Tokushima, Japan, 2Department of Radiological Technology, Tokushima Bunri University, Sanuki-city, Japan

Uterine adenomatoid tumor (AT) is a rare benign neoplasm of mesothelial origin. MRI findings of surgically proven 10 ATs were retrospectively evaluated. Most ATs (9/10) appeared as a heterogeneous intensity mass on T2WI with admixture of well-defined myoma-like low intensity area reflecting the areas of smooth muscle hypertrophy, and ill-defined high intensity areas reflecting the areas of abundant tubules. AT may contain high intensity areas on DWI, occasionally appearing as ring-like high intensity area (3/9), with relatively high ADC (6/9) due to T2 shine-through effect. Intra-tumoral hemorrhage was observed on SWAN (1/6) but not on T1WI (0/10).

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