 Ovarian cancer is a common and lethal disease for which early detection and treatment in high volume centers and by specialized clinicians is known to improve survival. Hence, accurate methods to preoperatively characterize the nature of an ovarian tumor are pivotal. The IOTA group has suggested Simple ultrasound based rules that can be used to classify adnexal masses as benign or malignant. In about 15 of patients the Simple Rules give an inconclusive result and therefore a suitable second line test is necessary. The benefit of using MRI in sonographically indeterminate masses has been evaluated previously. However, the ability of MRI to correctly classify tumors unclassifiable by the IOTA Simple Rules has not been examined. The group of Thomassin-Naggara et al has recently developed the ADNEXMR SCORING system, this is the first Magnetic Resonance Imaging MRI score system that focuses on ovarian tumors. 