PTPN13 and T-cell non-Hodgkin lymphoma: PTPL1 was methylated in two Burkitt lymphoma cell lines (CA46 and Raji), one acute T cell lymphoma cell line (Jurkat) and one DLBCL cell line (DB); and unmethylated in the cutaneous T cell lymphoma cell line (Hut78), and in two mantle cell lymphoma cell lines (Maver and Z138).