Figure 15a. Focal adenomyosis. (a) Sagittal T2-weighted turbo spin-echo (4900/120) MR image shows focal widening of the junctional zone (arrows) in the posterior wall of the uterine fundus. (b) Sagittal image obtained during the secretory stage of the menstrual cycle demonstrates a change in appearance, especially high-signal-intensity foci (arrows).