PROBLEM TO BE SOLVED: To provide a detection method of cancer.SOLUTION: A cancer detection method measures an expression level of soluble CD155 protein or a gene encoding the protein in a biological sample, and associates the measurement result with a cancer possibility.COPYRIGHT: (C)2014,JPO&INPIT【課題】癌の検出方法の提供。【解決手段】生体試料中の可溶型CD155タンパク質又は該タンパク質をコードする遺伝子の発現量を測定し、当該測定結果と癌の可能性とを関連づけることを特徴とする、癌の検出方法。【選択図】なし