SLC2A1 and neoplasm: Initial positron emission tomography imaging using [18F]fluoro‐2‐deoxy‐d‐glucose ([18F]FDG) radiotracer confirmed increased glucose uptake in CAL 27 and UT‐SCC‐14 tumors in vivo, supported by glucose transporter 1 (GLUT1) expression observed in tumor section immunohistochemistry.