title: Prostate Cancer Diagnosis on Repeat Magnetic Resonance Imaging-Transrectal Ultrasound Fusion Biopsy of Benign Lesions: Recommendations for Repeat Sampling.
abstract: Urologists face a dilemma when a lesion identified on multiparametric magnetic resonance imaging is benign on image guided fusion biopsy. We investigated the detection rate of prostate cancer on repeat fusion biopsy in multiparametric magnetic resonance imaging lesions initially found to be pathologically benign on fusion biopsy.
  
  
  
  We reviewed the records of all patients from 2007 to 2014 who underwent multiparametric magnetic resonance imaging and image guided fusion biopsy. We identified men who underwent rebiopsy of the same discrete lesion after initial fusion biopsy results were benign. Data were documented on a per lesion basis. We manually reviewed UroNav system (Invivo, Gainesville, Florida) needle tracking to verify accurate image registration. Multivariate analysis was used to identify clinical and imaging factors predictive of prostate cancer detection at repeat fusion biopsy.
  
  
  
  A total of 131 unique lesions were rebiopsied in 90 patients. Of these 131 resampled lesions 21 (16%) showed prostate cancer, which in 13 (61.9%) was Gleason 3 + 3. On multivariate analysis only lesion growth on repeat multiparametric magnetic resonance imaging was significantly associated with prostate cancer detection at repeat biopsy (HR 3.274, 95% CI 1.205-8.896, p = 0.02).
  
  
  
  Pathologically benign multiparametric magnetic resonance imaging lesions on initial image guided fusion biopsy are rarely found to harbor clinically significant prostate cancer on repeat biopsy. When prostate cancer was identified, most disease was low risk. An increase in lesion diameter was an independent predictor of prostate cancer detection. While these data are retrospective, they may provide some confidence in the reliability of negative initial image guided fusion biopsies despite a positive multiparametric magnetic resonance imaging finding.
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Raju
authors.initials: R
authors.lastname: Chelluri
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Amichai
authors.initials: A
authors.lastname: Kilchevsky
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Arvin K
authors.initials: AK
authors.lastname: George
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Abhinav
authors.initials: A
authors.lastname: Sidana
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Frye
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Daniel
authors.initials: D
authors.lastname: Su
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Michele
authors.initials: M
authors.lastname: Fascelli
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Richard
authors.initials: R
authors.lastname: Ho
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Steven F
authors.initials: SF
authors.lastname: Abboud
authors.affiliation: Molecular Imaging Program, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Baris
authors.initials: B
authors.lastname: Turkbey
authors.affiliation: Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Merino
authors.affiliation: Molecular Imaging Program, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Choyke
authors.affiliation: Center for Interventional Oncology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
authors.forename: Bradford J
authors.initials: BJ
authors.lastname: Wood
authors.affiliation: Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland. Electronic address: pintop@mail.nih.gov.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Pinto
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D061705:Image-Guided Biopsy / Q000379:methods; D053783:Magnetic Resonance Imaging, Interventional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011467:Prostate / Q000000981:diagnostic imaging / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D012189:Retrospective Studies; D018084:Ultrasonography, Interventional / Q000379:methods*
keywords: high-intensity focused; image-guided biopsy; magnetic resonance imaging; prostatic neoplasms; transrectal; ultrasound; watchful waiting