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Hereditary multiple exostoses: an educational review.

Alvaro Rueda-de-Eusebio1, Sara Gomez-Pena2, María José Moreno-Casado2,3,4

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Summary
This summary is machine-generated.

Hereditary multiple exostoses (HME) causes bone tumors and complications. Early diagnosis and imaging are key to managing HME and monitoring for malignant transformation.

Keywords:
ChondrosarcomaConventional radiographyHereditary multiple exostosesMagnetic resonance imagingOsteochondroma

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Area of Science:

  • Orthopedics
  • Genetics
  • Radiology

Background:

  • Hereditary multiple exostoses (HME) is an autosomal dominant disorder affecting 1 in 50,000 to 100,000 individuals.
  • Characterized by the development of multiple osteochondromas, primarily on long and flat bones.
  • Diagnosis is typically clinical and radiological, with genetic testing for ambiguous cases.

Purpose of the Study:

  • To review the clinical presentation, pathogenesis, imaging characteristics, complications, and treatment of HME.
  • To highlight the importance of multi-modality imaging in diagnosing and assessing HME.
  • To emphasize the need for follow-up to rule out malignant transformation.

Main Methods:

  • Review of current knowledge on HME.
  • Discussion of diagnostic criteria including radiological findings (WHO criteria).
  • Emphasis on various imaging techniques (radiography, CT, MRI, ultrasound, nuclear medicine) for lesion visualization and complication assessment.

Main Results:

  • HME is associated with mutations in EXT-1 and EXT-2 genes.
  • Common complications include skeletal deformities, fractures, bursitis, and neural/vascular issues.
  • A significant risk (10%) of malignant transformation to secondary chondrosarcoma exists in HME patients.

Conclusions:

  • Accurate diagnosis and assessment of HME rely on a combination of clinical and radiological evaluations.
  • Imaging, particularly MRI and ultrasound for cartilage cap measurement, is crucial for detecting malignancy.
  • Regular follow-up is essential for optimal patient care and monitoring potential complications, including malignant transformation.