Relationship of Sirenomelia with Gestational Diabetes Mellitus and Hypothyroidism

Sirenomelia is a rare congenital structural anomaly characterized by developmental disorders of the caudal region. Abnormalities observed in sirenomelia constitute the most severe form of caudal regression syndrome (CRS). It can be diagnosed by antenatal ultrasonography. The present study aimed to discuss a case with sirenomelia born from a mother with a history of gestational diabetes mellitus (GDM) and hypothyroidism. The present study is the first case report in the literature in which maternal hypothyroidism and sirenomelia were found simultaneously.