Magnetic resonance imaging findings in ovarian torsion.

Hemorrhagic infarction of the ovary is a known complication of ovarian torsion. However, the imaging findings on magnetic resonance imaging (MRI) are not well known. One case report is available.’ Edema of the ovary is primarily due to obstruction of venous and lymphatic flow with continued arterial perfusion, which leads to diffuse enlargement and edema of the ovarian parenchyma and distension of the follicles due to transudation of fluid within them. The degree of torsion at this time is insufficient to cause ischemic necrosis, but is sufficient to elevate capillary hydrostatic pressure and to interfere with lymphatic drainage. With further progression of time, venous occlusion occurs, which is followed by arterial thrombosis.’ At this time, hemorrhagic infarction of the ovary results. MRI findings are reported in a case of a massively enlarged ovary with surgically and pathologically proven hemorrhagic infarction secondary to ovarian torsion. The findings differ from those previously reported.’