Sirenomelia: Case Report

Objective: It is aimed in this study to evaluate the characteristics of a case of sirenomelia diagnosed at our obstetrics department. Case: A 23 years old woman (G2P1) with an intrauterine pregnancy of 35 weeks of pregnancy referred to our clinic with a cervical dilatation of 9 cm and delivered a baby (2,600 g and 1st and 5th minutes of Apgar scores of 3-0) with fetal anomalies such as single lower extremities, rudimentary foot and external genitalia which are in the shape of a small bud. The upper extremities and anal hiatus were normal. The initial diagnosis of the baby was sirenomelia. Autopsy also confirmed the diagnosis of sirenomelia. There were undeveloped bone pelvis, single lower extremities, fusion of the femur bones, rudimentary tibia bones and absence of fibulas. Urinary bladder, ureter and urethra were absent, and rectum was atresic. On microscopic evaluation there was haemorrhage at lungs, liver, heart and kidney. The placenta and umbilical cord were normal. Conclusion: Sirenomelia is a rare and lethal congenital anomaly. It is important to diagnose this anomaly in order to give counseling to the family for termination of the pregnancy.