Prenatal Diagnosis of Ascites With Hydrometrocolpos and Uterus Didelphys in a Monoamniotic Twin Pregnancy

Hydrometrocolpos is a rare congenital disorder very rarely reported on prenatal sonography. A female fetus may have a dilated vagina and uterus due to accumulation of mucous secretions in the genital tract. The sonographic appearance is of cystic dilatation of these organs due to genital tract obstruction secondary to an imperforate hymen, a transverse vaginal membrane, or some degree of vaginal atresia. 1 Although the neonatal presentation is known, to our knowledge, no clear data exist regarding the fetal presentation. Few reports on the prenatal diagnosis of hydrometrocolpos by sonography have been published in which diagnosis and even in utero treatment were suggested. 2 In this report, we aim to describe the prenatal sonographic appearance and prenatal evaluation of a unique case of hydrometrocolpos associated with ascites and uterus didelphys in one fetus of a monochorionic, monoamniotic gestation.