The value of percentage free prostate specific antigen (PSA) in the detection of prostate cancer among patients with intermediate levels of total PSA (4.0–10.0 ng/mL) in Nigeria

References

• D.M.ParkinP.PisaniJ.FerlayEstimates of the worldwide incidence of 25 major cancers in 1990Int J Cancer801999827
   PubMed Web of Science ®Google Scholar
• D.N.OsegbeProstate cancer in Nigerians. Facts and nonfactsJ Urol157199713401343
   Web of Science ®Google Scholar
• N.EkeM.K.SapiraProstate cancer in Port Harcourt, Nigeria: Features and outcomesNig J Surg Res420023444
   Google Scholar
• J.O.OgunbiyiO.B.ShittuIncreased incidence of prostate cancer in NigeriansJ Natl Med Assoc91999159164
   Google Scholar
• W.J.CatalonaJ.P.RichieF.R.AhmannM.A.HudsonP.T.ScardinoR.C.FlaniganetalComparison of digital rectal examination and serum prostate-specific antigen in the early detection of prostate cancer: results of a multicenter clinical trial of 6,630 menJ Urol151199412831290
   PubMed Web of Science ®Google Scholar
• W.J.CatalonaA.W.PartinK.M.SlawinM.K.BrawerR.C.FlaniganA.PateletalUse of the percentage of free prostate-specific antigen to enhance differentiation of prostate cancer from benign prostatic disease: a prospective multicenter clinical trialJAMA279199815421547
   PubMed Web of Science ®Google Scholar
• W.J.CatalonaD.S.SmithT.L.RatliffJ.W.BaslerDetection of organ-confined prostate cancer is increased through prostate-specific antigen-based screeningJAMA2701993948954
   PubMed Web of Science ®Google Scholar
• A.ChristenssonC.B.LaurellH.LiljaEnzymatic activity of prostate-specific antigen and its reactions with extracellular serine proteinase inhibitorsEur J Biochem1941990755757
   PubMedGoogle Scholar
• H.LiljaA.ChristenssonU.DahlénM.T.MatikainenO.NilssonK.PetterssonetalProstate-specific antigen in human serum occurs predominantly in complex with alpha1-antichymotrypsinClin Chem37199116181620
   PubMed Web of Science ®Google Scholar
• U.H.StenmanJ.LeinonenH.AlfthanS.RannikkoK.TuhkanenO.AlfthanA complex between prostate-specific antigen and alpha-1-antichymotrypsin is the major form of prostate-specific antigen in serum of patients with prostatic cancer assay of the complex improves clinical sensitivity for cancerCancer Res511991222226
   PubMed Web of Science ®Google Scholar
• A.ChristenssonT.BjorkO.NilssonU.DahlénM.T.MatikainenA.T.CockettetalSerum prostate-specific antigen complexed to alpha-1-antichymotrypsin as an indicator of prostate cancerJ Urol1501993100105
   PubMed Web of Science ®Google Scholar
• J.E.OesterlingS.J.JacobsenG.G.KleeK.PetterssonT.PiironenP.A.AbrahamssonetalFree, complexed and total serum prostate-specific antigen: the establishment of appropriate reference ranges for their concentrations and ratiosJ Urol154199510901095
   PubMed Web of Science ®Google Scholar
• H.TanakaS.MurakamiT.IgarashiT.AbeK.SuzukiN.SekitaetalFree/total PSA ratio of prostate-specific antigen (PSA) for prostate cancer detection in patients with gray zone PSA levelHinyokika Kiyo431997855860
   Google Scholar
• C.G.ArcangeliD.L.ShepherdD.S.SmithP.A.HumphreyD.W.KeetchW.J.CatalonaCorrelation of percent free PSA and pathologic features of prostatic carcinomasJ Urol155Suppl.1996415
   Google Scholar
• H.B.CarterA.W.PartinA.A.LudererE.J.MetterP.LandisD.W.ChanetalPercentage of free prostate-specific antigen in sera predicts aggressiveness of prostate cancer a decade before diagnosisUrology491997379384
   PubMed Web of Science ®Google Scholar
• J.PannekH.G.RittenhouseD.W.ChanJ.I.EpsteinP.C.WalshA.W.PartinThe use of percent free PSA for staging of men with clinically localized prostate cancerJ Urol159199812381242
   PubMed Web of Science ®Google Scholar
• H.MatsuyamaY.BabaG.YamakawaN.YamamotoK.NaitoDiagnostic value of prostate-specific antigen-related parameters in discriminating prostate cancerInt J Urol72000409414
   Web of Science ®Google Scholar
• M.KuriyamaY.KawadaY.AraiH.MaedaS.EgawaK.KoshibaetalSignificance of free to total PSA ratio in men with slightly elevated serum PSA Levels: a Cooperative StudyJ Clin Oncol281998661665
   Web of Science ®Google Scholar
• T.O.MorganS.J.JacobsenW.F.McCarthyD.G.JacobsonD.G.McLeodJ.W.MoulAge-specific reference ranges for serum prostate-specific antigen in black menN Engl J Med3351996304310
   PubMed Web of Science ®Google Scholar
• W.J.CatalonaA.W.PartinK.M.SlawinC.K.NaughtonM.K.BrawerR.C.FlaniganetalPercentage of free PSA in black versus white men for detection and staging of prostate cancer: a prospective multicenter clinical trialUrology552000372376
   PubMed Web of Science ®Google Scholar
• J.E.FowlerJr.J.SandersS.A.BiglerJ.RigdonN.K.KilambiS.A.LandPercent free prostate specific antigen and cancer detection in black and white men with total prostate specific antigen 2.5-9.9 ng./mlJ Urol163200014671470
   Google Scholar
• W.J.CatalonaD.S.SmithT.L.RatliffK.M.DoddsD.E.CoplenJ.J.YuanetalMeasurement of prostate-specific antigen in serum as a screening test for prostate cancerN Engl J Med324199111561161
   PubMed Web of Science ®Google Scholar
• M.P.Laguna PesC.Guinda SevillanoA.Zazo RomojaroJ.DomínguezA.García LuzónJ.Borrego HernandoetalClinical usefulness of free PSA/total PSA ratio in the early diagnosis of prostatic cancerArch Esp Urol532000333341
   Google Scholar
• R.SawyerJ.J.BermanA.BorkowskiG.W.MooreProstate-specific antigen in black menLancet34719961329
   Web of Science ®Google Scholar
• F.M.AbbiyesukuO.B.ShittuO.O.OduwoleB.O.OsotimehinProstate specific antigen in the Nigerian AfricanAfr J Med Med Sci29200097100
   Google Scholar