1. Department of Obstetrics and Gynecology, State University of Campinas- Unicamp, Campinas Faculty of Medical Sciences, São Paulo, Brazil.; Section of Imaginology, Sumaré State Hospital, Sumaré, São Paulo,, Brazil

2. Department of Obstetrics and Gynecology, State University of Campinas-Unicamp, Campinas Faculty of Medical Sciences, São Paulo, Brazil

3. Section of Imaginology, Sumaré State Hospital, Sumaré, São Paulo, Brazil

4. Department of Radiology, Federal University of Rio de Janeiro National Faculty of Medicine, Rio de Janeiro, RJ, Brazil