Mathematical model of solid tumor formation
  The problem of the onset and growth of solid tumour in homogeneous tissue is regarded using an approach based on local interaction between the tumoral and the sane tissue cells. The characteristic sizes and growth rates of spherical tumours, the points of the beginning and the end of spherical growth, and the further development of complex structures (elongated outgrowths, dendritic structures, and metastases) are derived from the assumption that the reproduction rate of a population of cancer cells is a non-monotone function of their local concentration. The predicted statistical distribution of the characteristic tumour sizes, when compared to the clinical data, will make a basis for checking the validity of the theory. 
R.G.Khlebopros, V.A.Slepkov, V.G.Sukhovolsky, Y.V.Mironov,   V.E.Fedorov, S.P.Gabuda