| Phenotype details |
see paper; ..., no heterotopic ossification, no radiographic anomalies cervical spine; progressive heterotopic ossification in characteristic anatomic patterns, minor congenital malformation great toe, ; cervical spine malformations (intra-articular ankylosis facet joints, early degenerative changes cervical spine); mother mild orthotopic changes in C-spine, daughters do not; intra-articular synovial osteochondromatosis of hips, DJD hips; |