CDH2 and head and neck squamous cell carcinoma: Mean fold change of CDH2 expression in the Parsortix was 0.45 (range: 0–1.95) in HD, 0.13 (range: 0–1.35) in CDH2 negative HNSCC patients and 22.26 (range: 4.08–58.49) in CDH2 positive HNSCC patients.