SLC36A2 and metastatic neoplasm: PAT6 had the highest number of GrzB+ cells in the primary tumor (120 ± 13.3 cells/mm (2)), while PAT2 (120 ± 11.2 cells/mm (2)) and PAT5 (132 ± 12.2 cells/mm2) had the most in the metastatic tumors.