Figure 4

Tumorigenicity of Eahy926 and A549 cells in vivo. (A) No tumor mass formed roughly within 14 days after s.c. injection of Eahy926 cells; (B) Tumor mass formed roughly within 10 days after s.c. injection of A549 cells; (C) On day 14 after s.c inoculation of Eahy926 cells; tissues collected from the inoculative site were identified as inflammatory necrosis in the Eahy926 cells group; (D) On day 14 after s.c inoculation of A549 cells, classic tumor microstructure was found in the A549 cells group and the rate of tumorigenicity was 100%.