A 21-year-old woman with complete uterus-vaginal duplication, hemivaginal obstruction and ipsilateral renal agenesis is presented. Ultrasonography shows uterus duplication with a parauterine cystic mass. MRI demonstrated uterus duplication and also a para/infra uterine mass with T1 and T2 weighted high-signal-intensity disclosing its serohematic nature. Surgical procedure confirmed the MRI findings.