TFE3 and neoplasm: Of the 76 enrolled patients, 19 (25.0%) were found strong (3+) TFE3 nuclear positivity in tumor cells, 11 (14.5%) showed moderate (2+) immunoreactivity, 26 (34.2%) showed equivocal (1+) TFE3 immunoreactivity, and 20 (26.3%) were negative for TFE3.