PROBLEM TO BE SOLVED: To provide a novel therapeutic agent for jaw cyst composed of a receptor tyrosine kinase inhibitor as an active ingredient.SOLUTION: The novel therapeutic agent for jaw cyst composed of the receptor tyrosine kinase inhibitor as an active ingredient is obtained based on the finding that the receptor tyrosine kinase inhibitor of an FGF, VEGF, EGF, PDGF or the like induces cell death of fibroblasts principally constituting the cyst wall of the jaw cyst.COPYRIGHT: (C)2012,JPO&INPIT【課題】新たな顎嚢胞治療剤の提供。【解決手段】FGF、VEGF、EGFまたはPDGF等の受容体チロシンキナーゼ阻害剤が顎嚢胞の嚢胞壁を主要に構成する線維芽細胞の細胞死を誘導することを見出し、該受容体チロシンキナーゼ阻害剤を有効成分とする新たな顎嚢胞治療剤を提供した。【選択図】なし