PTPRJ and neoplasm: Protein tyrosine phosphatase receptor type J (PTPRJ, DEP1) is described as a tumour suppressor gene that negatively regulates angiogenesis, cell proliferation and migration and therefore is involved in tumour progression in some human cancers (Aya-Bonilla et al. 2013; Bilotta et al. 2016; Fournier et al. 2016; Zhang et al. 2017).