Prenatal diagnosis of fetal hydrometrocolpos secondary to a cloacal anomaly by magnetic resonance imaging

S. Hayashi, H. Sago, K. Kashima, Y. Kitano, T. Kuroda, T. Honna, S. Nosaka, T. Nakamura, Y. Ito, M. Kitagawa, M. Natori

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Fetal female urogenital anomalies are often difficult to evaluate by ultrasonography, especially in late gestation. We report a case of fetal hydrometrocolpos detected at 35 weeks of gestation. Ultrasonography revealed a large retrovesical septate hypoechogenic mass in the fetal abdomen, however the sonographic findings were inconclusive. Magnetic resonance imaging (MRI) confirmed that the abdominal mass was fluid-filled with a mid-plane septum in the midline posterior to the bladder, and showed a connection to the dilated uterus that was duplicated. These findings were consistent with a diagnosis of hydrometrocolpos with septate vagina and uterus didelphys. The neonate showed abdominal distension, ambiguous genitalia and anal atresia with a single perineal opening. Hydrometrocolpos was secondary to a urethral type of cloacal anomaly. Aspiration of the mass and a colostomy were performed on the first postnatal day, followed by anorectoplasty at 19 months of age. MRI is a useful complementary tool for assessing fetal urogenital anomalies when ultrasonography is inconclusive.

Original languageEnglish
Pages (from-to)577-579
Number of pages3
JournalUltrasound in Obstetrics and Gynecology
Issue number5
Publication statusPublished - 2005 Oct
Externally publishedYes


  • Cloacal anomaly
  • Hydrometrocolpos
  • MRI
  • Prenatal diagnosis
  • Urogenital anomaly

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Reproductive Medicine
  • Radiology Nuclear Medicine and imaging
  • Obstetrics and Gynaecology


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