Monarch Disease Ontology term MONDO_0007167 (atelosteogenesis type I) is a perinatally lethal skeletal dysplasia characterized by severe short-limbed dwarfism, joint dislocations, club feet along with distinctive facies and radiographic findings. Also known as: AO1, AOI, atelosteogenesis type 1, giant cell chondrodysplasia, spondylo-humero-femoral dysplasia.