MYBBP1A and head and neck squamous cell carcinoma: Several findings support the assumption that MYBBP1A is a key regulator of tumor cell physiology: (I) in the preclinical mouse model of tumor relapse and in matched pairs of HNSCC patients MYBBP1A showed high expression in primary tumors which was severely reduced in recurrent tumor samples, and (II) MYBBP1A expression in murine SCC-7 cells as well as human HNSCC cell lines support proliferation but was inversely correlated with tumor cell migration.