Sirenomelia

the sirenomelia is a very uncommon congenital anomaly characterized by fusion of lower extremities or the presence of an only and rudimentary lower limb. this is the case of sirenomelia diagnosed at birth to describe the clinical, epidemiological, ultrasonographic features of this congenital anomaly considering that the possible cause if a disruptive vascular phenomenon. the severe oligohydramnios during the second trimester of pregnancy is one of the suspected ultrasonographic signs for the sirenomelia.