Abstract

Sirenomelia is a rare and lethal congenital anomaly with an incidence of one in 60,000 to 100,000 pregnancies .The characteristic features of sirenomelia is complete fusion of lower limbs and commonly associated with renal agenesis, absent external genitalia, gastrointestinal defects (blind ending colon and imperforate anus); small, absent, fused or poorly formed pelvic bones. The characteristic and distinguished anatomic findings in Caudal Regression Syndrome are presence of single umbilical, persistent vitelline artery. Birth defects in upper body sometimes occur and include abnormality in Ears, Lungs, Anus, Spine and Brain. Death of the child occurs most commonly due to underdeveloped and immature lungs caused due to oligohydroamnios.

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