70岁的王先生（化名）三年前确诊 前列腺癌 时，已经出现了骨转移。经过规范治疗，他的PSA（前列腺特异性抗原，可简单理解为前列腺癌的重要参考指标）从279.2 μg/L成功降到了0.010 μg/L，达到了正常范围（≤4.000 μg/L）。

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