  In this paper, we consider radial distributional solutions of the quasilinear
equation $-\Delta_N u=f(u)$ in the punctured open ball $
B_R\backslash\{0\}\subset \RR^N$, $N \geq 2$. We obtain sharp conditions on the
nonlinearity $f$ for extending such solutions to the whole domain $B_R$ by
preserving the regularity. For a certain class of noninearity $f$ we obtain the
existence of singular solutions and deduce upper and lower estimates on the
growth rate near the singularity.
