TGFB1 and granular cell tumor: For TGF-β1, the median IHC score for was 108.26 (8.741–234.56) in GC tissues, 127.22 (56.67–234.56) in GAL-1-positive GC tissues, and 43.47 (8.741–97.12) in GAL-1-negative GCT.