Effect of hypoxia to hypoxia for 14 days on tumor growth of lung cancer in rats. After cancer cell injection, animals were exposed to hypoxia (10% O2) for 14 days (Figure 1B). (A) Tumor growth curve, (B) Tumor weight, (C) Body weight, (D) Food intake and (E) Hematocrit. * p < 0.05 as compared with normoxia. n = 6 for each group.