Sarcomatous transformation in diaphyseal aclasis

Area of Science:

• Orthopedics
• Radiology
• Oncology

Background:

• Multiple hereditary exostosis (MHE), also known as diaphyseal aclasis, is a genetic disorder.
• It is characterized by the formation of numerous osteochondromas, which are benign bone tumors.
• A significant concern in MHE is the potential for malignant transformation into chondrosarcoma.

Purpose of the Study:

• To review the diagnostic role of imaging modalities in multiple hereditary exostosis.
• To highlight the importance of distinguishing malignant transformation from pseudotumors.
• To emphasize the features of sarcomatous change detectable by advanced imaging.

Main Methods:

• Review of radiographic and computed tomography (CT) findings in MHE.
• Analysis of magnetic resonance imaging (MRI) characteristics in differentiating malignancy.
• Correlation of imaging findings with clinical presentation and pathological outcomes.

Main Results:

• Radiographs and CT scans are crucial for diagnosing MHE and identifying osteochondromas.
• MRI is effective in visualizing sarcomatous changes within the cartilaginous cap of osteochondromas.
• MRI aids in differentiating true malignancy (chondrosarcoma) from benign pseudotumors.

Conclusions:

• Accurate diagnosis of MHE relies on a combination of clinical evaluation and advanced imaging.
• Early detection of malignant transformation through MRI is critical for patient management.
• Distinguishing between chondrosarcoma and pseudotumors using MRI improves treatment strategies.