Sirenomelia: A rare anomaly and challenges of ultrasound diagnosis

Abstract

Background: Sirenomelia also known as mermaid syndrome is a rare congenital anomaly, characterised by disorder of the lower spine and the lower limbs.
Methods: A review of medical records.
Results: A neonate was delivered with fusion of the lower limbs, absence of external genitalia, imperforate anus and a single umbilical artery. The upper half was grossly normal.
Conclusion: This case demonstrates the rarity of sirenomelia and the difficulty of ultrasound diagnosis after first trimester of pregnancy.

Keywords: Sirenomelia, Mermaid syndrome, Oligohydraminous, Ultrasound diagnosis