Illustrate MRI features of main myometrial masses List problem-solving MR imaging techniques for accurate diagnosis of myometrial masses Discuss the diagnostic clues that allow differentiation of the different myometrial mass causes

A wide spectrum of pathologies occurs in myometrium. Benign lesions may show various signal intensity and mimic malignacy, making dilemma to differentiate them. MRI is actually a helpful tool in characterizing masses using morphologic appearances, signal intensity on T2, Diffusion-weighted imaging (DWI), apparent diffusion coefficient (ADC) measurement and enhancement curve.

Leiomyomas Leiomyomas arethe most frequent myometrial masses, arising from uterine smooth muscle. They are classified according to their situation in the myometrium as submucosal, intramural and subserosal. MRI is the most sensitive technique for detection and characterization of leiomyomas. They typically appear as well-demarcated, round and homogenous masses, hypo intense on T2 weighted-images Fig. 1, intermediate intensity signal on T1 Fig. 2, without diffusion restriction Fig. 3 . Decresead signal intensity on both diffusion sequences are called blackout phenomenon and is a suggestive criterion of...

MRI is a useful technique in characterizing of myometrial pathologies. It can provide information for each diagnosis by combining different signal on T2, DWI and enhancement type. MRI offer also anatomic information which is crucial for therapeutic strategy.

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