PTK2 and cancer: FAK is a protein involved in cell adhesion, migration, and signalling pathways related to tumour growth and metastasis.26 Although not encoded by an oncogene, FAK overexpression and phosphorylation have been linked to several cancers, including squamous cell carcinoma of the head and neck27, neuroblastoma28, breast cancer29, ovarian cancer30 and colorectal cancer.29 In recent years, studies have shown that increased FAK expression is associated with poor prognosis in bladder cancer, highlighting FAK as a potential drug target.13,14