Fig. 10

MRI of bilateral endometriomas in a 27-year-old woman with pelvic pain exacerbated in the last few days. Sagittal (a) and oblique-coronal (b) T2-weighted images show bilateral endometriomas with fluid-blood levels (arrowheads) and low signal intensity in the declivous portion of the cyst (‘shading sign’, arrows). On sagittal (c) and oblique-coronal (d) precontrast fat-suppressed T1-weighted images, the cysts demonstrate high signal intensity (arrowheads). Note the clot within right endometrioma with very high T1 signal intensity (thin arrows)