Problem to be solved: to provide a new technique to evaluate the effectiveness of cancer therapy including cancer immunotherapy for cancer patients.Use of the choloresol 25 hydroxylase (ch25h) gene, ch25h protein or 25 - hydroxy cholesterol (25 OHC) as a marker to determine the effectiveness of the application of cancer therapy including cancer immunotherapy to cancer patients.No selection【課題】癌患者への癌免疫療法を含む癌治療法の適用の有効性を判定する新たな技術を提供する。【解決手段】癌患者への癌免疫療法を含む癌治療法の適用の有効性を判定するマーカーとしてのCholesterol 25-hydroxylase(Ch25H)遺伝子、Ch25Hタンパク質又は25-水酸化コレステロール(25OHC)の使用。【選択図】なし