Figure 13. Focal adenomyosis in a 49-year-old woman. Sagittal T2-weighted image shows a heterogeneous area of high signal intensity (arrowheads) within the myometrium that protrudes into the uterine cavity. The interface between the lesion and the myometrium is indistinct. Fine hyperintense striations (arrows) extend into the myometrium; this appearance is an extreme example of pseudowidening of the endometrium.