The tumor (T) to skeletal muscle (M) 18FDG accumulation ratio (T/M) was 4.2±0.6 in the case of Pgp- and 4.8±0.7 for the Pgp+ tissues (n = 7, ± SD), indicating significantly higher rate of glucose consumption in tumors compared to the muscle cells in both cases. This evidence concerns the gene PGP and neoplasm.