[Fibrochondrogenesis].

Fibrochondrogenesis is a lethal form of dwarfism similar to thanatophoric dwarfism. It is distinguished radiologically by the widening of the metaphyses of the long bones, and, on lateral x-ray of the spine, by a median fissure of the body of the vertebra without any loss of vertebral height. The condition is inherited an autosomal recessive. A study of growing cartilage confirms that this disease is a distinct entity as there is fibrosis of the cartilage which is never present in thanatophoric dwarfism or in the different forms of achondrogenesis.