Cole-Carpenter syndrome

Cole-Carpenter syndrome is an extremely rare genetic skeletal disorder characterized by bone fragility with features overlapping osteogenesis imperfecta, combined with distinctive craniofacial abnormalities. The condition primarily affects the skeletal system, with patients presenting with multiple fractures occurring with minimal or no trauma, osteopenia (reduced bone density), and significant growth retardation. A hallmark feature is craniosynostosis — the premature fusion of one or more cranial sutures — which distinguishes this condition from classic osteogenesis imperfecta. Additional craniofacial features may include frontal bossing, midface hypoplasia, proptosis (bulging eyes), and a distinctive facial appearance. The skeletal manifestations include bowing of the long bones, vertebral compression fractures, and generalized osteoporosis. Some patients may also exhibit hydrocephalus, ocular proptosis, and dental anomalies. The condition typically presents at birth or in early infancy, with fractures sometimes detected prenatally or in the neonatal period. Two genetic forms have been identified: Cole-Carpenter syndrome type 1 (CCS1), caused by mutations in the P4HB gene encoding protein disulfide isomerase, and Cole-Carpenter syndrome type 2 (CCS2), caused by mutations in the SEC24D gene involved in protein transport. There is no cure for Cole-Carpenter syndrome, and management is primarily supportive and symptomatic. Treatment strategies may include bisphosphonate therapy (such as pamidronate) to improve bone density and reduce fracture frequency, surgical intervention for craniosynostosis to prevent increased intracranial pressure, orthopedic management of fractures and skeletal deformities, and physical therapy to optimize mobility and function. A multidisciplinary approach involving geneticists, orthopedic surgeons, neurosurgeons, and rehabilitation specialists is essential for optimal patient care.

Common questions about Cole-Carpenter syndrome