Is Perioperative Radiotherapy Effective in Preventing Local Recurrence in Myxofibrosarcoma?

Area of Science:

• Oncology
• Surgical Oncology
• Radiation Oncology

Background:

• Myxofibrosarcoma (MFS) is a rare, locally aggressive soft tissue sarcoma with a high recurrence risk.
• The role of perioperative radiotherapy (RT) in preventing local recurrence (LR) of MFS is not well-established.
• This study retrospectively evaluated the impact of perioperative RT on local recurrence in MFS patients.

Purpose of the Study:

• To assess the effectiveness of perioperative radiotherapy in reducing local recurrence in myxofibrosarcoma.
• To compare local recurrence rates between patients who received and did not receive radiotherapy.
• To explore the influence of neoadjuvant versus adjuvant radiotherapy on local recurrence.

Main Methods:

• Retrospective analysis of 75 patients diagnosed with MFS treated at a single institution.
• Data collection included demographics, tumor characteristics, and treatment variables from electronic medical records.
• The primary endpoint was the occurrence of local recurrence.

Main Results:

• Local recurrence was observed in 28% of patients receiving RT versus 36% of those not receiving RT (p=0.20).
• Neoadjuvant RT showed a lower LR rate (7.6%) compared to adjuvant RT (50%) (p=0.124).
• A significant reduction in LR was noted in radiated patients with negative surgical margins (8.33% vs 25%, p=0.034).

Conclusions:

• Perioperative radiotherapy showed a trend towards reducing local recurrence in MFS but did not reach statistical significance.
• Neoadjuvant radiation appears more effective than adjuvant radiation for MFS.
• Achieving negative surgical margins is paramount, and RT may offer additional benefit in these cases.