The prostate cancer diagnosis value of prostate-specific antigen change quantity before and after antibiotic treatment in patients with abnormal prostate-specific antigen / 中国医师进修杂志

ABSTRACT

Objective To investigate the prostate cancer diagnosis value of prostate-specific antigen (PSA) and free prostate-specific antigen (FPSA) change quantity before and after antibiotic treatment in patients with abnormal PSA.Methods Eighty-five patients with elevated PSA were selected,and the patients were treated with antibiotic (levofloxacin intravenous drip for 1 week).The PSA and FPSA levels were detected before and after treatment.All of the patients underwent prostate needle puncture biopsy.The relation between the PSA,FPSA change quantity before and after treatment and the puncture biopsy positive rate were analyzed.Results The PSA and FPSA levels after treatment were significantly lower than those before treatment(5.82 ± 1.61) μ g/L vs.(7.71 ± 1.32) μ g/L and (0.80 ± 0.14) μ g/L vs.(0.98 ± 0.17) μ g/L,there were statistical differences (P ＜ 0.05).In 85 patients,10 cases were puncture biopsy positive.After treatment,no PSA change was in 8 cases,PSA decreased ＜ 10％ was in 27 cases,PSA decreased 10％-30％ in 24 cases,PSA decreased 31％-50％ was in 18 cases,and PSA decreased ＞ 50％ was in 8 eases,and puncture biopsy positive were 1 case (1/8),4 cases (14.8％,4/27),3 cases (12.5％,3/24),2 cases (2/18),0case,respectively.Conclusions The PSA can decrease after antibiotic treatment in patients with abnormal PSA,and small decrease of PSA does not mean that the risk of prostate cancer disappears,but the PSA decrease ＞ 50％ after antibiotic treatment means the risk of prostate cancer decreases,which may be closely observed.In patients unable to tolerate or unwilling to accept the prostate needle puncture biopsy,the PSA change quantity before and after antibiotic treatment can help to diagnose prostate cancer.