| Phenotype details |
see paper; ..., 2y-onset heterotopic ossification; characteristic malformations great toe (hallux valgus, malformed 1st metatarsal, and/or monophalangism); progressive heterotopic ossification in characteristic anatomic patterns; proximal medial tibial osteochondromas; thumb malformations (short 1st metacarpal, +/- monophalangism); sparse, thin scalp hair (more prominent in 2nd decade); mild cognitive impairment; childhood glaucoma; |