DICER1 and squamous cell carcinoma: In the subgroup of patients with both squamous cell carcinoma and normal performance status (ECOG = 0, n = 107), tumor status (P = 0.021), nodal status (P = 0.001), vascular infiltration (P = 0.011), and expression of Dicer (P = 0.031), but not tumor differentiation (P = 0.587), were independently correlated with DSS (Table 2).