ABSTRACT Objective To evaluate whether the presence of a hypointense signal at T2-weighted imaging in a solid ovarian lesion on magnetic resonance imaging is a predictor of stability and benignity. Methods This is a single center study, prospectively read with retrospective acquired data. The database was searched for patients who underwent magnetic resonance imaging between January 2008 and October 2019 and whose reports mentioned solid ovarian lesions with low signal on T2-weighted imaging. A total of 47 nodules were included. A radiologist who was blinded to the clinical indication for magnetic resonance imaging and original reports evaluated the cases. Objective and subjective criteria of ovarian lesions in magnetic resonance imaging were evaluated. Results Thirty-five nodules were considered benign/stable and 12 were considered non-stable. The analysis showed that the non-stable lesions showed statistically more hyperintensity at T1-weighted imaging compared to the stable lesions. Conclusion T2-weighted imaging hypointensity can be considered a predictor of stability in solid ovarian lesions when associated with iso/hypointensity in T1-weighted imaging.

Abstract Objective To evaluate the prevalence of sonographic signs suggestive of deep infiltrative endometriosis and endometriomas in patients referred for transvaginal sonography as part of a routine annual gynecological evaluation. We also describe the clinical and imaging aspects associated with the incidental findings of endometriosis. Methods This was a retrospective observational study including women (n=339; aged 18-56 years) referred for transvaginal sonography as part of a routine gynecological evaluation (without clinical suspicion of endometriosis). Patients were asked about their symptoms. In addition, they were systematically checked by an experienced radiologist for sonographic signs of deep infiltrative endometriosis (hypoechoic nodules or tissue thickening, with regular or irregular margins) in the retrocervical area, vaginal fornix, rectosigmoid junction, and bladder, as well as for ovarian endometriomas (cysts with thick walls and hypoechogenic content). Results Signs suggestive of deep infiltrative endometriosis or endometriomas were identified in 27 of the 339 women (8.0%; 95%CI: 5.1-10.8). Endometriomas were observed in 8 patients (2.4%; 95%CI: 0.7-4.0); 23 women had signs of lesions in the retrocervical area (6.8%; 95%CI: 4.1-9.5), 3 in the rectum and sigmoid colon (0.9%; 95%CI: 0-1.9), and 1 in the vagina (0.3%; 95%CI: 0-0.9). Six patients (1.8%) had signs of endometriosis at more than one site, and thirteen were asymptomatic. There were no significant differences in symptomatology between women with and without sonographic signs of deep infiltrative endometriosis. Conclusion Routine transvaginal sonography offers an opportunity to search for signs of deep infiltrative endometriosis in oligosymptomatic women particularly those not previously suspected to have endometriosis.