Related Experiment Videos
Manifestations of hereditary multiple exostoses
Jonathan R Stieber1, John P Dormans
1Department of Orthopaedic Surgery, Monmouth Medical Center, Long Branch, NJ, USA.
The Journal of the American Academy of Orthopaedic Surgeons
|April 27, 2005
Summary
Osteochondromas are common pediatric bone tumors. Mutations in the EXT gene family cause hereditary multiple exostosis, leading to skeletal deformities and a small risk of cancerous transformation.
Area of Science:
- Orthopedics
- Genetics
- Pediatric Oncology
Background:
- Osteochondromas, or cartilage-capped exostoses, are common benign pediatric bone tumors.
- Hereditary multiple exostosis (HME) is an autosomal dominant disorder characterized by multiple osteochondromas.
- Mutations in the EXT gene family disrupt chondrocyte regulation, causing abnormal bone growth and skeletal deformities.
Purpose of the Study:
- To review the etiology, clinical manifestations, and management of osteochondromas and HME.
- To highlight the common skeletal deformities associated with HME.
- To discuss the surgical options for correcting deformities and the risk of sarcomatous transformation.
Main Methods:
- Literature review of osteochondroma and HME.
- Analysis of genetic linkage studies implicating EXT gene family mutations.
- Review of clinical presentations and surgical outcomes.
Main Results:
- HME is linked to EXT gene mutations affecting chondrocyte proliferation and maturation.
- Common deformities include short stature, limb length discrepancies, and joint abnormalities.
- Surgical intervention can correct deformities, and there is a slight risk of sarcomatous change.
Conclusions:
- Osteochondromas and HME result from genetic defects in bone growth regulation.
- Early diagnosis and surgical management are crucial for addressing skeletal deformities.
- Monitoring for sarcomatous transformation is important in patients with HME.