Does microscopically involved margin increase disease recurrence after curative surgery in papillary thyroid...

Area of Science:

• Oncology
• Surgical Pathology
• Thyroid Cancer Research

Background:

• The prognostic value of microscopically involved surgical margins in papillary thyroid carcinoma (PTC) is not well-established.
• Evaluating the impact of margin involvement and its specific location on disease recurrence is crucial for patient management.

Purpose of the Study:

• To determine if a microscopically involved margin after curative surgery for PTC impacts disease recurrence.
• To investigate whether the location of an involved margin (anterior vs. posterior) influences recurrence risk.

Main Methods:

• A retrospective analysis of 638 patients who underwent curative surgery for PTC.
• Patients were categorized based on margin status (involved vs. uninvolved) and location of involvement (anterior vs. posterior).
• Multivariate analysis was employed to identify independent predictors of recurrence.

Main Results:

• A microscopically involved margin was associated with worse 10-year disease-free survival (DFS).
• However, involved margin status was not an independent risk factor for recurrence after adjusting for other variables.
• A posterior involved margin significantly increased recurrence risk (HR=22.95), whereas an anterior involved margin did not.

Conclusions:

• While overall margin involvement is not an independent predictor of DFS, its location is critical.
• Posterior involved margins are a significant risk factor for recurrence in PTC patients.
• Anterior involved margins do not appear to increase the risk of disease recurrence.