Tumorigenicity of SWCNT-induced CSC-like cells. (A, B) Growth kinetics of SP and non-SP (NSP) tumors derived from lung cancer H460 (A) and malignant transformed BSW (B) cells. (C, D) Representative SP (left) and NSP (right) tumors derived from H460 (C) and BSW (D) cells. (E, F) Representative H&E micrographs of SP and NSP tissue samples derived from H460 (E) and BSW (F) cells. Condensation of heterochromatin and multi-nucleated cells are evident in the tissue samples from SP and NSP derived from H460, and SP derived from BSW cells.