Disorder with manifestations of moderate-to-severe metaphyseal changes, mild epiphyseal involvement, rhizomelic shortening of the lower limbs with bowing of the femora and/or tibiae, coxa vara, genu varum and pear-shaped vertebrae in childhood. The syndrome has been described in a large Missouri (US) kindred with 14 affected members in 4 generations. Though some spontaneous improvement of the skeletal defects may occur in adolescence, the affected individuals remained shorter than their age-matched unaffected siblings. Predisposition deformities to osteoarthritis have been noted. This condition is caused by mutation in the MMP13 gene (locus 11q22.3) and transmitted in an autosomal dominant manner.