Abstract: The present invention provides a technology for performing a test for prostate cancer. This method is for testing the possibility of having prostate cancer, the method comprising (1) measuring the amount or concentration of a biomarker in a body fluid sample collected from a subject, the biomarker being at least one member selected from the group consisting of dimethyl glutarate, 2,6-xylidine, 2-hydroxy-2-methylpropiophenone, 2,6-di(propan-2-yl) phenol, dimethyl succinate, acetophenone, 2-phenyl-2-propanol, and 3,5,5-trimetyl-2-cyclohexenone.

Abstract: An insert for a drill is provided which is capable of being detachably attached to an axial line side and an outer circumferential side of a tip portion of a drill main body rotated around an axial line, in which cutting edges are formed on ridge portions of a polygonal face in a drill rotation direction of a polygonal flat plate-shaped insert body such that rotation trajectories around the axial line toward a tip side of the drill main body overlap each other when viewed in an axial line direction, and a land is provided on each of the cutting edges. When the insert is attached to the drill main body, a land angle of the land gradually increases to a negative angle side from one end portion of the cutting edge positioned on an outer circumferential side of the drill main body (11) toward the other end portion side of the cutting edge, and a land width of the land gradually increases from the one end portion of the cutting edge toward the other end portion side.