If the PSA concentration is greater than 10 ug/ml, the chance of prostate cancer will increase, and further rectal ultrasound should be done to support the diagnosis.
If PSA is greater than 40 ug/ml, advanced prostate cancer may occur. If the PSA concentration increases after prostate cancer treatment, it may indicate local recurrence or distant spread. However, PSA missed 3 cases13 of cancer cases with important clinical significance, and it is necessary to cooperate with rectal digital examination and rectal ultrasound examination to reduce the misdiagnosis rate.