| A form of non-rhizomelic chondrodysplasia punctata, a primary bone dysplasia, with characteristics of hypoplasia of the distal phalanges of the fingers, nasal hypoplasia, epiphyseal stippling appearing in the first year of life, as well as mild and non-rhizomelic shortness of the long bones. Stippled epiphyses are usually seen in the tarsus, knee, and distal phalanges, but may be more generalized, including epiphyses of the long bones, vertebrae, hips, hyoid and tracheal cartilage. At birth, the diagnosis is apparent with facial dysmorphism, quite similar to that of maxillonasal dysplasia. The causative gene is ARSE (Xp22) encoding the arylsulfatase E protein essential for the correct composition of cartilage and bone matrix during development. The pattern of inheritance is X-linked. |
