Lymph node density predicts lung metastases in oral squamous cell carcinoma

Area of Science:

• Oncology
• Pathology
• Surgical Oncology

Background:

• Oral squamous cell carcinoma (SCC) survival is influenced by lymph node status.
• Lymph node density (LND) has emerged as a potential prognostic factor in SCC.
• Previous studies suggest LND may predict survival, but its specific association with lung metastases in oral SCC is underexplored.

Purpose of the Study:

• To investigate the association between lymph node density (LND) and survival outcomes in oral SCC patients with invaded lymph nodes.
• To determine if an LND threshold of 0.07 predicts overall survival, distant metastasis-free survival, and lung metastasis-free survival.
• To evaluate LND as an independent predictor of survival, adjusting for other pathological factors.

Main Methods:

• Retrospective analysis of 35 oral SCC patients with histologically confirmed invaded lymph nodes.
• Calculation of LND as the ratio of invaded lymph nodes to total lymph nodes.
• Statistical analysis using log-rank testing and Cox proportional hazards model for survival analysis, adjusting for pathological stage, margin status, and extracapsular spread.

Main Results:

• An LND of 0.07 or higher was significantly associated with shorter overall survival (p<0.02).
• Higher LND correlated significantly with reduced survival free of distant metastases (p<0.01).
• An LND threshold of 0.07 strongly predicted shorter survival free of lung metastases (p<0.01) and was an independent prognostic factor.

Conclusions:

• Lymph node density is a significant predictor of lung metastases in oral SCC.
• An LND of 0.07 or greater is a valuable prognostic marker for adverse survival outcomes in oral SCC.
• LND assessment can aid in risk stratification and treatment planning for oral SCC patients.