Univariable Cox proportional hazard models were computed with respect to OS, recurrence‐free survival (RFS), locoregional RFS (LR‐RFS), and disease‐specific survival (DSS) for the variables tumor size and nodal metastases (T‐ and N‐status), resection margin status (R‐status), perineural invasion (Pn‐status), lymphovascular invasion (L‐status), grading, extracapsular extension (ECE), HPV, EpCAM, and Slug levels, both following visual and digital quantification (Fig. S2). The gene discussed is EPCAM; the disease is neoplasm.