KDM1A and head and neck squamous cell carcinoma: Furthermore, correlation analysis of LSD1 and SNAIL revealed their co-expression in primary HNSCC (PCC = 0.3237, p = 2.067 × 10−8) (Table 3) as well as across all available samples (PCC = 0.2982, p = 3.611 × 10−13) (Table 4).