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Abstract #4039

MR manifestations of polypoid endometriosis: Clinical feasibility of conventional and advanced MR techniques

Mayumi Takeuchi1, Kenji Matsuzaki2, and Masafumi Harada1

1Department of Radiology, Tokushima University, Tokushima, Japan, 2Department of Radiological Technology, Tokushima Bunri University, Kagawa, Japan

Polypoid endometriosis (PE) is a rare variant of benign endometriosis and may mimic malignant tumors. MR manifestations of five women with pathologically proven PE were retrospectively evaluated. PE was associated with pelvic endometriosis (4/5) with “black rim sign” (3/5), and with adenomyosis (5/5). PE showed high intensity on T2WI (5/5), high intensity hemorrhagic foci on T1WI (3/5), hemorrhagic signal voids on susceptibility-weighted sequences (2/2), high intensity on DWI (4/4) with relatively high ADC values (mean, 1.67 x 10-3 mm2/s), gradually increasing time-intensity curve pattern on DCE-MRI (4/4) with intense contrast-enhancement (4/5) or weak contrast-enhancement (1/5, with malignant transformation).

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