Isolated singularities of solutions of a 2-D diffusion equation with mixed reaction

We study the local properties of positive solutions of the equation -\Delta u+ae^{bu}=m|\nabla u|^q in a punctured domain \Omega\setminus\{0\} of \bf R^2 where m,a,b are positive parameters and q>1. We study particularly the existence of solutions with an isolated singularity and the local behaviour of such singular solutions.