Figure 4

Results from multiple level analysis: Kaplan Meier analysis of 5-year disease-specific survival for 80 patients with oral squamous cell carcinoma with and without tertiary lymphoid structures. The presence of tertiary lymphoid structures (TLSs) is associated with improved survival in patients with oral squamous cell carcinoma (OSCC) (P = 0.039). The Kaplan-Meier curve shows a 5-year disease-specific survival rate of 88.2% for TLS-positive patients and 60.3% for TLS-negative patients. The P-value was calculated using the log-rank test.