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In this paper, we consider the following Robin problem: $$\begin{eqnarray*}\displaystyle \left\{ \begin{array}{ @{}ll@{}} \displaystyle - \Delta u= \mid x{\mathop{\mid }\nolimits }^{\alpha } {u}^{p} , \quad & \displaystyle x\in \Omega , \\ \displaystyle u\gt 0, \quad & \displaystyle x\in \Omega , \\ \displaystyle \displaystyle \frac{\partial u}{\partial \nu } + \beta u= 0, \quad & \displaystyle x\in \partial \Omega , \end{array} \right.&&\displaystyle\end{eqnarray*}$$ where $\Omega $ is the unit ball in ${ \mathbb{R} }^{N} $ centred at the origin, with $N\geq 3$, $p\gt 1$, $\alpha \gt 0$, $\beta \gt 0$, and $\nu $ is the unit outward vector normal to $\partial \Omega $. We prove that the above problem has no solution when $\beta $ is small enough. We also obtain existence results and we analyse the symmetry breaking of the ground state solutions.