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The correlation of OS with different clinical variables. A. Kaplan-Meier curve showing the OS of all 123 cases. B. Kaplan-Meier curves of macular-type lesions (blue, n = 53) and nodular-type lesions (yellow, n = 70). C. Kaplan-Meier curves of different cervical lymph node (CLN) status. The blue line indicates patients with negative CLNs (n = 85) and the yellow line represents patients with positive CLNs (n = 38).
