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[Hereditary multiple exostoses after 40 years of development: a case report]
J Rambeloarisoa1, M el Guedj, L Legeai-Mallet
1Service de médecine interne, hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75475 Paris, France.
La Revue De Medecine Interne
|August 7, 2002
Summary
Hereditary multiple exostoses (HME) can rarely lead to malignant degeneration. This case report details successful resection of a chondrosarcoma in an HME patient with EXT1 gene mutation, showing stable disease post-surgery.
Area of Science:
- Skeletal Dysplasias
- Oncology
- Genetics
Background:
- Hereditary multiple exostoses (HME) is an autosomal dominant disorder affecting bone development.
- Malignant transformation of exostoses occurs in approximately 2% of HME patients.
- Genetic heterogeneity involves loci such as EXT1, EXT2, and EXT3.
Observation:
- A 45-year-old male patient with HME developed a well-differentiated chondrosarcoma (grade I) from a pelvic exostosis.
- The patient underwent surgical resection of the chondrosarcoma.
- Genetic analysis identified the causative mutation at the EXT1 locus.
Findings:
- The resected chondrosarcoma showed no recurrence after 15 years of follow-up.
- Radiological lesions associated with HME remained stable during the follow-up period.
- The genetic findings provide insights into the pathophysiology of HME and its malignant potential.
Implications:
- This case highlights the importance of monitoring HME patients for malignant degeneration.
- Successful surgical management of chondrosarcoma in HME is feasible.
- Understanding the genetic basis of HME aids in comprehending disease progression and complications.