A Radiological Scoring System for Differentiation between Enchondroma and Chondrosarcoma.

Area of Science:

• Orthopedic Oncology
• Radiology
• Pathology

Background:

• Distinguishing enchondromas from atypical cartilaginous tumors (ACTs) and chondrosarcomas is clinically significant.
• Central cartilaginous tumors present diagnostic challenges, necessitating reliable differentiation methods.

Purpose of the Study:

• To investigate the correlation between radiological findings and the final diagnosis of central cartilaginous tumors.
• To develop and validate a novel radiological scoring system for differentiating enchondromas from ACTs/chondrosarcomas.

Main Methods:

• A cohort of 81 patients with central cartilaginous tumors underwent radiological assessment.
• Key radiological findings (e.g., periosteal reaction, endosteal scalloping, extraskeletal mass) were correlated with final histological diagnoses.
• A new scoring system was developed by integrating significant radiological indicators.

Main Results:

• Specific radiological features on X-ray, CT, MRI, bone scan, and thallium scan showed significant correlation with final diagnoses (p < 0.05).
• The developed radiological scoring system achieved 88% sensitivity, 89% specificity, and 88% accuracy in differentiating enchondromas from ACTs/chondrosarcomas in a validation cohort of 17 patients.
• The scoring system's diagnostic performance was statistically significant (p = 0.003).

Conclusions:

• Combined radiological assessment, utilizing a scoring system based on integrated findings, is recommended for accurate differentiation.
• This approach aids in distinguishing benign enchondromas from malignant ACTs/chondrosarcomas, improving patient management.
• Radiological evaluation plays a crucial role in the preoperative diagnosis of cartilaginous bone tumors.