Jeune syndrome or asphyxiating thoracic dysplasia is an autosomal recessive
osteochondrodysplasia. It is one of the six short-rib (polydactyly) syndro
mes. The disease has a wide spectrum of manifestations, ranging from a late
nt to a mild or lethal condition. We describe the prenatal sonographic diag
nosis of Jeune syndrome at 14 weeks of gestation in a fetus at risk for thi
s condition, and the development of the syndrome throughout the pregnancy.