什么是PSAPSA是一种蛋白质,只存在于前列腺细胞内的一种特异性的蛋白质,在医学上称为血清前列腺特异性抗原。正常人体的血液中含有一定量的PSA,当血液中PSA超过正常水平时,就要高度怀疑有前列腺癌的可能性。由于检查血清PSA是一项敏感而简便的前列腺癌的筛选手段,目前被广泛应用于中老年男性的体检中。 What is PSAPSA is a protein that exists only in prostate cells, a specific protein, medically known as serum prostate-specific antigen. Normal human blood contains a certain amount of PSA, when the PSA in blood exceeds the normal level, we must highly doubt the possibility of prostate cancer. Because the examination of serum PSA is a sensitive and simple screening method for prostate cancer, it is widely used in the examination of middle-aged and old men.