SLC2A1 and neoplasm: Studies have shown that inflammatory diseases of the lungs, including tuberculosis, cryptococcal pneumonia, and inflammatory pseudotumors are rich in inflammatory cells, such as leukocytes, macrophages and lymph node cells, similar with the tumor cells, and glucose transport receptors GLUT1–5 can be expressed on the surface, which promotes its high uptake of 18F-FDG (17, 18).