Wang identified peritumoral lymphoid cuffs in approximately 80% of schwannomas and found a significant correlation with SUV max, suggesting that peritumoral inflammation may contribute to increased FDG uptake.16) In addition, overexpression of glucose transporters—especially GLUT1 and GLUT3, which are abundant in neural tissue—has also been implicated.15) Anatomical site may further influence FDG accumulation, with tumors located in the gastrointestinal tract and abdominal cavity tending to show higher SUVmax than those in other locations.16). Here, SLC2A1 is linked to schwannoma.