'Epiphyseal dysgenesis' in Laurence-Moon-Biedl-Bardet syndrome.

Ten patients with Laurence-Moon-Biedl-Bardet syndrome were investigated. They all belonged to one large family within which several intermarriages had taken place. We found that, apart from the already described abnormalities, these patients suffered from dysgenesis of the following epiphyses: vertebrae, proximal femur, proximal tibia, capitellum, tarsal navicular, and the distal epiphysis of the first metatarsal. The degree of polydactyly, a prominent feature of this syndrome, varied from patient to patient, ranging from a wide fifth metatarsal or metacarpal to a complete sixth digit. As in other epiphyseal dysgenesis, a pseudoepiphysis of the distal first metacarpal was present. One patient (the eldest) was tetraparetic due to severe spinal stenosis.