Institutional Price 
4 weeks
CPT Code 
Test Code 
Test Methods 
Deletion/Duplication analysis
Specimen Types Accepted 
Cultured Cells
Extracted DNA

Patients with X-linked recessive chondrodysplasia punctata (CDPX1) [OMIM #302950], also known as brachytelephalangic chondrodysplasia punctata, have asymmetric shortening of the limbs, underdevelopment of the nasal cartilage, scoliosis, malalignment of the spine, short stature and mental retardation. Additional findings include ichthyosis in the newborn period and cataracts. Males are predominantly impacted, with carrier females typically not exhibiting symptoms or radiographic abnormalities. Mutations in the ARSE gene have been identified in 30-75% of patients with CDPX1. Patients with CDPX1 exhibit decreased levels of the aryl sulfatase enzyme, which is thought to be involved in cartilage and bone formation, although the exact mechanism remains unclear. The ARSE enzyme can also be inhibited by warfarin, and CDPX1 can exhibit a similar phenotype to that manifested in warfarin embryopathy.