Fig. 1

Three-tesla MR images of a mature teratoma or dermoid cyst arising from the left ovary in a 53-year-old patient. The fatty component in the lesion is hyperintense on the 3D-LAVA fat-only T1-weighted image (a) and hypointense on the water-only T1-weighted image (b) (arrows). c T2-weighted high-resolution image shows the fatty component within the lesion to be hyperintense (arrow). The nidus itself contains a fatty component that is also hyperintense on 3D-LAVA fat-only T1-weighted image (a) and hypointense on the water-only T1-weighted image (b) (arrowheads). d Diffusion-weighted image using a b value of 1,200 s/mm² shows a high signal intensity rim representing restricted diffusion from sebaceous material surrounding the nidus and punctuate areas of restricted diffusion scattered throughout the nidus (arrowhead). The pedunculated uterine fibroid (T) at the level of the right lateral aspect of the uterus presents with typical hypointensity on T2 (c) without associated restricted diffusion (d)