A small molecule and orally available inhibitor of colony-stimulating factor-1 receptor (CSF1R; cFMS) with potential antineoplastic activity. cFMS tyrosine kinase inhibitor ARRY-382 binds to and inhibits the activity of cFMS. By preventing colony-stimulating factor-1 (CSF-1)-cFMS signaling, this agent may inhibit tumor cell proliferation in cFMS-overexpressing tumor cells. cFMS, a tyrosine kinase receptor, is overexpressed in certain tumor cell types and plays an essential role in macrophage differentiation and regulation of cell proliferation. Check for active clinical trials using this agent.