In this talk, we consider a free boundary problem modeling the growth of tumors under the action of inhibitors and Gibbs-Thomson relation. We first give a complete classification of the existence of radially symmetric stationary solutions by a threshold  of cell-to-cell adhesiveness  , then prove that a branch of symmetry-breaking stationary solutions bifurcates from radially symmetric stationary solutions at a decreasing sequence  . Finally, we conclude the impact of inhibitors and Gibbs-Thomson relation on tumor growth.