  We investigate noise-induced pattern formation in a model of cancer growth
based on Michaelis-Menten kinetics, subject to additive and multiplicative
noises. We analyse stability properties of the system and discuss the role of
diffusion and noises in the system's dynamics. We find that random dichotomous
fluctuations in the immune response intensity along with Gaussian environmental
noise lead to emergence of a spatial pattern of two phases, in which cancer
cells, or, respectively, immune cells predominate.
