We describe here a female infant, exhibiting lethal short-limbed dwarfism. The condition superficially resembled achondrogenesis. However, unlike achondrogenesis there was an associated severe spondylocostal dysostosis and major non-skeletal anomalies, particularly a cerebellar Dandy-Walker cyst, cardiovascular and urogenital malformations. The chondroosseous morphology was nonspecific. The case is believed to be unique. It is therefore suggested that this constellation of anomalies constitutes a "new" lethal syndrome, different from the delineated chondrodysplasias.