KRT1 and neoplasm: At 120 min, the uptake of [18F]TFB by tumor tissues was 25.57 ± 0.68%ID/g, 22.94 ± 1.35%ID/g, and 19.51 ± 1.33%ID/g (n = 3) in MKN45 (Figure 8(c)), NIS-A549 (Figure 8(f)), and K1 (Figure 8(i)) tumor-bearing nude mice, respectively.