[Dwarfism and hyperlaxity, facial dysmorphism and multiple dislocations. Larsen's syndrome?].

Five similar cases of children ranging from 6 months to 6 1/2 years of age are reported. The presented with dwarfism, generalized hyperlaxity, characteristic facial appearance, constant dislocations of elbows and knees. Bone-age was advanced and bones were slender and osteoporotic with metaphyseal thickening. All the cases appeared separately in normal families. These associated malformations resembled Larsen's syndrome, in spite of some different features.