CNTN2 and neoplasm: On day 9, the average tumor volume of PBS was about 1,200 mm3, whereas those of Tα1, Tα1-Fc, and Tax are 881.71 ± 305.2, 761.02 ± 239.85, and 518.21 ± 280.74 mm3 (Fig. 7B), respectively.