PTPRT (Protein Tyrosine Phosphatase, Receptor Type T): PTPRT is a gene that encodes a protein belonging to the protein tyrosine phosphatase family, which is crucial for cell signalling. It plays a role in regulating cellular processes such as cell growth and differentiation. Mutations in PTPRT have been linked to several cancers, particularly colorectal cancer, owing to its involvement in signalling pathways that control cell proliferation.