Several receptor protein tyrosine phosphatases (RPTPs) are implicated as tumour suppressors (Barazeghi et al., 2019; Gu et al., 2019; March et al., 2011; Östman et al., 2006; Starr et al., 2009; Wang et al., 2004) as well as regulators of cell–cell adhesion (Young et al., 2021). This evidence concerns the gene PTPRT and neoplasm.