Ovarian Torsion

Etiology: twisting of ovary causing decreased arterial flow (but ovary has dual blood supply from ovarian + uterine arteries)
US: enlarged ovary with multiple peripheral cysts
Clinical: large ovarian cysts / masses are predisposing factor for torsion

Cases of Ovarian Torsion

MRI of ovarian torsion — T1 coronal (left) and T1 sagittal (right) and T2 axial (below) MRI images show a heterogeneous intraperitoneal mass that appears to have hemorrhagic and calcified components.