Stimulated ovary without torsion diagnosed as torsion by MRI. Axial T2 weighted MR image of the pelvis in a 31-year-old woman with abdominal pain and leukocytosis at 5 weeks 6 days gestational age demonstrates marked asymmetric enlargement of the right ovary (arrow) with increased right ovarian stromal signal intensity. Prospective and retrospective MRI diagnosis was ovarian torsion, but further history (not available at the time of image interpretation) revealed known asymmetric enlargement of the right ovary since the time of egg retrieval