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Objective: The aim of this study was to investigate the role of pelvic magnetic resonance imaging (MRI) in maksing the correct diagnosis of massive ovarian edema (MOE) and ovarian torsion (OT). Methods: Contrast-enhanced (CE) pelvic MRI and diffussion-weighted imaging (DWI) was performed in 4 patients admitted to hospital with lower abdominal pain and had pre-diagnosis of OT and MOE with B-mode ultrasound and Doppler ultrasound Results: Doppler ultrasound examination of ovaries in three patients with OT did not reveal arterial or venous flow. In the patients with MOE, monophasic arterial flow with prolonged acceleration was detected. Venous flow was not detected. Left ovary size of the patient with MOE increased. Heterogeneous low-intensity on T1W images and heterogeneous high intensity on T2A-weighted imagses were observed. CE fat-saturated T1WI revealed partial parenchymal enhancement. Size of the ovaries increased in two patients with OT. Homogeneous low and high instensity were observed respectively on T1WI and T2WI. There was no parenchymal enhancement on CE fat-satusrated T1WI. Size of the ovaries increased in other patient with OT. Reduction and increment of intensity reflecting the hemorrhagic infarction were observed respectively on T2WI and T1WI, which became evident to the periphery. DWI of ovarian tissue in patients with ovarian torsion resvealed diffusion limitations reflecting the infarction. Conclusions: OT can be differentiated correctly from MOE with the CE pelvic MRI findings of patients. Pre-opseratively information determined from DWI can help guide clinicians to decide for correct type of surgery. J Clin Exp Invest 2013; 4 (1): 95-100

Magnetic resonance imaging findings of massive ovarian edema and ovarian torsion