bifurcation plots and CSC dynamics. Bifurcation analysis on model (1) revealed that the system undergoes a transcritical bifurcation as P
varies. Two steady states exist: E0 (trivial state) and E1 (positive state). The former one correspond to an unsustainable tumor growth, while the latter describes tumor growth and stabilization. When P
reaches the transcritical bifurcation point P
, E0 and E1 collide and interchange their stability conditions.