GPT and brain neoplasm: Using this combination of markers, the analysis allowed us to identify: A set of juvenile brain tumor which were clearly ALT (see Table 1, green highlight), a set of brain tumors which appeared telomerase-dependent (see Table 1, light blue highlight), a set of ALT/TERT+ tumors (see Table 1, pink highlight), and a set of tumors with uncharacterized TMM mechanisms.