The Significance of a "Close" Margin in Extremity Sarcoma: A Systematic Review

Area of Science:

• Oncology
• Surgical Pathology
• Orthopedic Surgery

Background:

• Surgical tumor margin status is crucial for successful sarcoma treatment.
• Current methods of defining and reporting tumor margins lack specificity and are controversial.
• The need for a more detailed classification of surgical margins is evident.

Purpose of the Study:

• To determine if a more specific classification of surgical margins is necessary for sarcoma treatment.
• To compare the predictive value of a dichotomous (positive/negative) margin system versus a more detailed classification.
• To evaluate the impact of margin specificity on predicting local recurrence in sarcoma patients.

Main Methods:

• A comprehensive literature search was conducted, with studies independently reviewed by two reviewers.
• Included studies involved at least ten patients with primary extremity sarcomas, reporting surgical margin and histologic grade.
• Local recurrence outcomes with a minimum two-year follow-up were analyzed from 22 articles encompassing 498 patients.

Main Results:

• The Enneking classification system distinguishes intralesional, marginal, and wide/radical margins.
• A marginal margin (close margin) showed a recurrence rate of 50.48%, closer to positive than negative margins.
• Wide/radical margins had a significantly lower recurrence rate (7.22%) compared to intralesional (75.76%) and marginal margins.
• Chemotherapy significantly reduced local recurrence rates in osteosarcoma.

Conclusions:

• The Enneking classification system provides more information on local recurrence than a simple dichotomous system.
• A detailed margin classification, like Enneking, is a more successful predictor of sarcoma treatment outcomes.
• This study suggests a potential practice-changing proposal for universal reporting of surgical margins in sarcoma across institutions.