| abstract |
An object of the present invention is to provide a new judgment method of Pca and a method of judging malignancy thereof, wherein "the terminal sialic acid residue of the sugar chain with respect to the free prostate-specific antigen amount in a living- (2, 3) -linked sugar chains in a galactose residue and measuring the ratio of the amount of free PSA having a sugar chain bound to? (2, 3) -th galactose residue and determining that the ratio is greater than 40% &Quot; |