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Challenges to Recruiting Men on Active Surveillance for Prostate Cancer in Clinical Chemoprevention Trials. Cancers (Basel) 2023; 15:cancers15041257. [PMID: 36831597 PMCID: PMC9954186 DOI: 10.3390/cancers15041257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/26/2023] [Accepted: 02/14/2023] [Indexed: 02/18/2023] Open
Abstract
Clinical trials play a critical role in evidence-based medicine, when rigorous scientific methodology is utilized to discover and test the effectiveness and safety of new drugs to prevent or cure diseases, including cancer. Participation in clinical trials thus becomes key to successful completion of these trials. Although it is estimated that >70% of Americans are inclined to participate in clinical trials, less than 5% of adult cancer patients participate in clinical trials. There is thus a large gap between those inclined to participate in clinical trials and actual participation in clinical trials. As with trials targeting men with prostate cancer (PCa) on active surveillance (AS), where the target population is mostly over 50 years of age, others have observed several challenges with recruitment and accrual in clinical trials. The participation rate is currently unavailable for men on primary and secondary chemoprevention trials. Additionally, with unanticipated environmental factors such as a pandemic or other natural emergencies that may severely impact the economy, personal property, travel and person-to person contact for study-related procedures, there is a need to continuously identify these challenges and determine solutions to recruitment barriers in chemoprevention trials to ensure timely completion of early phase trials. Recent studies regarding the impact of the pandemic on clinical trial recruitment have shown that cancer prevention trials were relatively more negatively impacted compared to cancer treatment trials. The goal of this manuscript is to review our experience in continuously evaluating the protocol and patient level challenges to recruiting subjects on AS for PCa in this cancer chemoprevention trial conducted at the Comprehensive Cancer Center (CCC) and report the contemporary strategies that we are utilizing to continue to recruit subjects in this trial. We provide data from our current trial as an example while discussing future strategies to improve overall clinical trial recruitment. These strategies can inform future design of contemporary cancer chemoprevention trials and, additionally, better select, focus and invest in strategies that are the most productive and efficient for recruiting target populations.
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Kumar NB, Hogue S, Pow-Sang J, Poch M, Manley BJ, Li R, Dhillon J, Yu A, Byrd DA. Effects of Green Tea Catechins on Prostate Cancer Chemoprevention: The Role of the Gut Microbiome. Cancers (Basel) 2022; 14:3988. [PMID: 36010981 PMCID: PMC9406482 DOI: 10.3390/cancers14163988] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 01/22/2023] Open
Abstract
Accumulating evidence supports green tea catechins (GTCs) in chemoprevention for prostate cancer (PCa), a leading cause of cancer morbidity and mortality among men. GTCs include (-)-epigallocatechin-3-gallate, which may modulate the molecular pathways implicated in prostate carcinogenesis. Prior studies of GTCs suggested that they are bioavailable, safe, and effective for modulating clinical and biological markers implicated in prostate carcinogenesis. GTCs may be of particular benefit to those with low-grade PCas typically managed with careful monitoring via active surveillance (AS). Though AS is recommended, it has limitations including potential under-grading, variations in eligibility, and anxiety reported by men while on AS. Secondary chemoprevention of low-grade PCas using GTCs may help address these limitations. When administrated orally, the gut microbiome enzymatically transforms GTC structure, altering its bioavailability, bioactivity, and toxicity. In addition to xenobiotic metabolism, the gut microbiome has multiple other physiological effects potentially involved in PCa progression, including regulating inflammation, hormones, and other known/unknown pathways. Therefore, it is important to consider not only the independent roles of GTCs and the gut microbiome in the context of PCa chemoprevention, but how gut microbes may relate to individual responses to GTCs, which, in turn, can enhance clinical decision-making.
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Affiliation(s)
- Nagi B. Kumar
- Cancer Epidemiology Program, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Stephanie Hogue
- Cancer Epidemiology Program, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Julio Pow-Sang
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Michael Poch
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Brandon J. Manley
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Roger Li
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Jasreman Dhillon
- Anatomic Pathology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Alice Yu
- Genitourinary Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Doratha A. Byrd
- Cancer Epidemiology Program, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
- Gastrointestinal Oncology, Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
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3
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Prostate Cancer Detection with mpMRI According to PI-RADS v2 Compared with Systematic MRI/TRUS-Fusion Biopsy: A Prospective Study. Tomography 2022; 8:2020-2029. [PMID: 36006067 PMCID: PMC9416664 DOI: 10.3390/tomography8040169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/05/2022] [Accepted: 08/07/2022] [Indexed: 11/17/2022] Open
Abstract
Background: mpMRI assesses prostate lesions through their PI-RADS score. The primary goal of this prospective study was to demonstrate the correlation of PI-RADS v2 score and the volume of a lesion with the presence and clinical significance of prostate cancer (PCa). The secondary goal was to determine the extent of additionally PCa in inconspicuous areas. Methods: All 157 patients underwent a perineal MRI/TRUS-fusion prostate biopsy. Targeted biopsies as well as a systematic biopsy were performed. The presence of PCa in the probes was specified by the ISUP grading system. Results: In total, 258 lesions were biopsied. Of the PI-RADS 3 lesions, 24% were neoplastic. This was also true for 36.9% of the PI-RADS 4 lesions and for 59.5% of the PI-RADS 5 lesions. Correlation between ISUP grades and lesion volume was significant (p < 0.01). In the non-suspicious mpMRI areas carcinoma was revealed in 19.7% of the patients. Conclusions: The study shows that the PI-RADS v2 score and the lesion volume correlate with the presence and clinical significance of PCa. However, there are two major points to consider: First, there is a high number of false positive findings. Second, inconspicuous mpMRI areas revealed PCa.
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Kim H, Kim JK, Choe G, Hong SK. Clinical strategy of repeat biopsy in patients with atypical small acinar proliferation (ASAP). Sci Rep 2021; 11:23143. [PMID: 34848744 PMCID: PMC8633016 DOI: 10.1038/s41598-021-02172-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
Atypical small acinar proliferation (ASAP) occurs in approximately 5% of prostate biopsies. Approximately 30–40% of patients with ASAP have biopsy detectable prostate cancer (PCa) within 5 years. Current guidelines recommend a repeat biopsy within 3–6 months after the initial diagnosis. The aim of the present study was to examine the association between ASAP and subsequent diagnosis of clinically significant PCa (csPCa). The need for immediate repeat biopsy was also evaluated. We identified 212 patients with an ASAP diagnosis on their first biopsy at our institution between February 2006 and March 2018. Of these patients, 102 (48.1%) had at least one follow-up biopsy. Clinicopathologic features including rates of subsequent PCa and csPCa were assessed. Thirty-five patients subsequently underwent radical prostatectomy (RP). Their pathologic results were reviewed. csPCa was defined as the presence of Gleason score (GS) ≥ 3 + 4 in ≥ 1 biopsy core. Adverse pathology (AP) was defined as high-grade (primary Gleason pattern ≥ 4) or non-organ-confined disease (pT3/N1) after RP. Of 102 patients, 87 (85.3%), 13 (12.7%), and 2 (2.0%) had one, two, and three follow-up biopsies, respectively. Median time from the initial ASAP diagnosis to the 2nd follow-up biopsy and the last follow-up biopsy were 21.9 months (range 1–129 months) and 27.7 months (range 1–129 months), respectively. Of these patients, 46 (45.1%) were subsequently diagnosed with PCa, including 20 (19.6%) with csPCa. Only 2 (2.0%) patients had GS ≥ 8 disease. Five (4.9%) patients had number of positive cores > 3. Of 35 patients who subsequently underwent RP, seven (20%) had AP after RP and 17 (48.6%) showed GS upgrading. Of these 17 patients, the vast majority (16/17, 94.1%) had GS upgrading from 3 + 3 to 3 + 4. 45.1% of patients with an initial diagnosis of ASAP who had repeat prostate biopsy were subsequently diagnosed with PCa and 19.6% were found to have csPCa. Our findings add further evidence that after a diagnosis of ASAP, a repeat biopsy is warranted and that the repeat biopsy should not be postponed.
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Affiliation(s)
- Hwanik Kim
- Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jung Kwon Kim
- Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Gheeyoung Choe
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sung Kyu Hong
- Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea. .,Department of Urology, Seoul National University College of Medicine, Seoul, Korea.
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Yambayev I, Sullivan TB, Suzuki K, Zhao Q, Higgins SE, Yilmaz OH, Litle VR, Moreira P, Servais EL, Stock CT, Quadri SM, Williamson C, Rieger-Christ KM, Burks EJ. Pulmonary Adenocarcinomas of Low Malignant Potential: Proposed Criteria to Expand the Spectrum Beyond Adenocarcinoma In Situ and Minimally Invasive Adenocarcinoma. Am J Surg Pathol 2021; 45:567-576. [PMID: 33177339 DOI: 10.1097/pas.0000000000001618] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Lung cancer screening has improved mortality among high-risk smokers but has coincidentally detected a fraction of nonprogressive adenocarcinoma historically classified as bronchoalveolar carcinoma (BAC). In the National Lung Screening Trial (NLST) the majority of BAC-comprising 29% of computed tomography-detected stage I lung adenocarcinoma-were considered overdiagnosis after extended follow-up comparison with the control arm. In the current classification, adenocarcinoma in situ and minimally invasive adenocarcinoma have replaced BAC but together comprise only ∼5% of stage I lung adenocarcinoma. Lepidic and subsets of papillary and acinar adenocarcinoma also infrequently recur. We, therefore, propose criteria for low malignant potential (LMP) adenocarcinoma among nonmucinous adenocarcinoma measuring ≤3 cm in total, exhibiting ≥15% lepidic growth, and lacking nonpredominant high-grade patterns (≥10% cribriform, ≥5% micropapillary, ≥5% solid), >1 mitosis per 2 mm2, angiolymphatic or visceral pleural invasion, spread through air spaces or necrosis. We tested these criteria in a multi-institutional cohort of 328 invasive stage I (eighth edition) and in situ adenocarcinomas and observed 16% LMP and 7% adenocarcinoma in situ/minimally invasive adenocarcinoma which together (23%) approximated the frequency of overdiagnosed stage I BAC in the NLST. The LMP group had 100% disease-specific survival. The proposed LMP criteria, incorporating multiple histologic parameters, may be a clinically useful "low-grade" prognostic group. Validation of these criteria in additional retrospective cohorts and prospective screen-detected cohorts should be considered.
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Affiliation(s)
| | - Travis B Sullivan
- Department of Translational Research, Ian C. Summerhayes Cell and Molecular Biology Laboratory
| | - Kei Suzuki
- Surgery, Boston University School of Medicine, Boston Medical Center, Boston
| | - Qing Zhao
- Departments of Pathology & Laboratory Medicine
| | | | | | - Virginia R Litle
- Surgery, Boston University School of Medicine, Boston Medical Center, Boston
| | - Paulo Moreira
- Surgery, Boston University School of Medicine, Boston Medical Center, Boston
| | - Elliot L Servais
- Department of Surgery, Lahey Hospital & Medical Center, Burlington, MA
| | - Cameron T Stock
- Department of Surgery, Lahey Hospital & Medical Center, Burlington, MA
| | - Syed M Quadri
- Department of Surgery, Lahey Hospital & Medical Center, Burlington, MA
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Çelik S, Kızılay F, Yörükoğlu K, Aslan G, Ozen H, Akdogan B, Sozen S, Baltaci S, Muezzinoglu T, Izol V, Bayazıt Y, Narter F, Türkeri L. Sextant Biopsy-Based Criteria for Clinically Insignificant Prostate Cancer Are Also Valid for the 12-Core Prostate Biopsy Scheme: A Multicenter Study of Urooncology Association, Turkey. Urol Int 2021; 106:35-43. [PMID: 33951662 DOI: 10.1159/000513658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 12/07/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND Epstein criteria based on sextant biopsy are assumed to be valid for 12-core biopsies. However, very scarce information is present in the current literature to support this view. OBJECTIVES To investigate the validity of Epstein criteria for clinically insignificant prostate cancer (PCa) in a cohort of the currently utilized 12-core prostate biopsy (TRUS-Bx) scheme in patients with low-risk and intermediate-risk PCa. METHOD Pathological findings were separately evaluated in the areas matching the sextant biopsy (6-core paramedian) scheme and in all 12-core schemes. Patients were divided into 2 groups according to the final pathology report of RP as true clinically significant PCa (sPCa) and insignificant PCa (insPCa) groups. Predictive factors (including Epstein criteria) and cutoff values for the presence of insPCa were separately evaluated for 6- and 12-core TRUS-Bx schemes. Then, different predictive models based on Epstein criteria with or without additional biopsy findings were created. RESULTS A total of 442 patients were evaluated. PSA density, biopsy GS, percentage of tumor and number of positive cores, PNI, and HG-PIN were independent predictive factors for insPCa in both TRUS-Bx schemes. For the 12-core scheme, the best cutoff values of tumor percentage and number of positive cores were found to be ≤50% (OR: 3.662) and 1.5 cores (OR: 2.194), respectively. The best predictive model was found to be that which added 3 additional factors (PNI and HG-PIN absence and number of positive cores) to Epstein criteria (OR: 6.041). CONCLUSIONS Using a cutoff value of "1" for the number of positive biopsy cores and absence of biopsy PNI and HG-PIN findings can be more useful for improving the prediction model of the Epstein criteria in the 12-core biopsy scheme.
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Affiliation(s)
- Serdar Çelik
- Department of Basic Oncology, Izmir Bozyaka Training and Research Hospital, Institute of Oncology, Health Science University, Urology Clinic and Dokuz Eylul University, Izmir, Turkey
| | - Fuat Kızılay
- Department of Urology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Kutsal Yörükoğlu
- Department of Pathology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Güven Aslan
- Department of Urology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Haluk Ozen
- Department of Urology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Bulent Akdogan
- Department of Urology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Sinan Sozen
- Department of Urology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Sumer Baltaci
- Department of Urology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Talha Muezzinoglu
- Department of Urology, Faculty of Medicine, Celal Bayar University, Manisa, Turkey
| | - Volkan Izol
- Department of Urology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - Yıldırım Bayazıt
- Department of Urology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - Fehmi Narter
- Department of Urology, Kadikoy Hospital, Mehmet Ali Aydınlar University, Istanbul, Turkey
| | - Levent Türkeri
- Department of Urology, Altunizade Hospital, Mehmet Ali Aydınlar Acıbadem University, Istanbul, Turkey
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Galosi AB, Palagonia E, Scarcella S, Cimadamore A, Lacetera V, Delle Fave RF, Antezza A, Dell'Atti L. Detection limits of significant prostate cancer using multiparametric MR and digital rectal examination in men with low serum PSA: Up-date of the Italian Society of Integrated Diagnostic in Urology. ACTA ACUST UNITED AC 2021; 93:92-100. [PMID: 33754619 DOI: 10.4081/aiua.2021.1.92] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 11/22/2022]
Abstract
Reasons why significant prostate cancer is still missed in early stage were investigated at the 22nd National SIEUN (Italian Society of integrated diagnostic in Urology, Andrology, Nephrology) congress took place from 30th November to 1st December 2020, in virtual modality. Even if multiparametric magnetic resonance (MR) has been introduced in the clinical practice several, limitations are emerging in patient with regular digital rectal examination (DRE) and serum prostate specific antigen (PSA) levels approaching the normal limits. The present paper summarizes highlights observed in those cases where significant prostate cancer may be missed by PSA or imaging and DRE. The issue of multidisciplinary interest had been subdivided and deepened under four main topics: biochemical, clinical, pathological and radiological point of view with a focus on PI-RADS 3 lesions.
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Affiliation(s)
- Andrea B Galosi
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Erika Palagonia
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Simone Scarcella
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Alessia Cimadamore
- Division of Pathology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Vito Lacetera
- Division of Urology, Azienda Ospedaliera Marche Nord, Pesaro.
| | - Rocco F Delle Fave
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Angelo Antezza
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
| | - Lucio Dell'Atti
- Division of Urology, School of Medicine, Università Politecnica delle Marche, Ancona.
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8
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Falagario UG, Jambor I, Ratnani P, Martini A, Treacy PJ, Wajswol E, Lantz A, Papastefanou G, Weil R, Phillip D, Lewis S, Haines K, Cormio L, Carrieri G, Kyprianou N, Wiklund P, Tewari AK. Performance of prostate multiparametric MRI for prediction of prostate cancer extra-prostatic extension according to NCCN risk categories: implication for surgical planning. MINERVA UROL NEFROL 2020; 72:746-754. [PMID: 32182231 DOI: 10.23736/s0393-2249.20.03688-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Prediction of extra-prostatic extension (EPE) in men undergoing radical prostatectomy (RP) is of utmost importance. Great variability in the performance of multiparametric magnetic resonance imaging (mpMRI) has been reported for prediction of EPE. The present study aimed to determine the diagnostic performance of mpMRI for predicting EPE in different National Comprehensive Cancer Network (NCCN) risk categories. METHODS Overall 664 patients who underwent radical prostatectomy with a staging mpMRI were enrolled in this single-center, retrospective study. Patients with mpMRI report non-compliant with PI-RADSv2.0, were excluded. Patients were stratified according to NCCN criteria: very low/low (VLR-LR) to High Risk (HR) in order to assess final pathology EPE rates (focal and established). Sensitivity, specificity, positive and negative predictive values of staging mpMRI were computed in each group. Univariable and multivariable analysis were used to evaluate predictors of positive surgical margins. RESULTS Pathological evaluation demonstrated established and focal EPE in 60 (9%) and 106 (16%) patients, respectively, while mpMRI suspicion for EPE was present in 180 (27%) patients. Age, preoperative PSA, PSA density, number of positive cores, NCCN groups, prostate volume, mpMRI suspicion for EPE, PIRADSv2.0 and lesion size differed significantly between the patients with any EPE and without EPE (all P≤0.05). The sensitivity of mpMRI in detecting any EPE varied from 12% (95% CI: 0.6-53%) in VLR-LR to 83% (66-93%) in HR while the corresponding values for the specificity were 92% (85-96%) and 63% (45-78%), respectively. Patients with false-negative mpMRI EPE prediction were more likely to have positive surgical margins in univariable (OR: 2.14; CI: 1.18, 3.87) as well as multivariable analysis adjusting for NCCN risk categories (OR: 1.97; CI: 1.08, 3.60). CONCLUSIONS The performance of mpMRI for prediction of EPE varies greatly between different NCCN risk categories with a low positive predicting value in patients at low to favorable intermediate risk and a low negative predictive value in patients at Unfavorable intermediate to high risk PCa. Given that mpMRI EPE misdiagnosis could have a negative impact on oncological and functional outcomes, NCCN risk categories should be considered when interpreting mpMRI findings in PCa patients.
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Affiliation(s)
- Ugo G Falagario
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA - .,Department of Urology and Organ Transplantation, University of Foggia, Foggia, Italy -
| | - Ivan Jambor
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Radiology, University of Turku, Turku, Finland
| | - Parita Ratnani
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Alberto Martini
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Ethan Wajswol
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Anna Lantz
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Urology, Karolinska University Hospital, Solna, Sweden
| | - George Papastefanou
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Rachel Weil
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Deron Phillip
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sara Lewis
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kenneth Haines
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Luigi Cormio
- Department of Urology and Organ Transplantation, University of Foggia, Foggia, Italy
| | - Giuseppe Carrieri
- Department of Urology and Organ Transplantation, University of Foggia, Foggia, Italy
| | - Natasha Kyprianou
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Peter Wiklund
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Urology, Karolinska University Hospital, Solna, Sweden
| | - Ashutosh K Tewari
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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9
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Frankcombe DE, Li J, Cohen RJ. Redefining the Concept of Clinically Insignificant Prostate Cancer. Urology 2020; 136:176-179. [DOI: 10.1016/j.urology.2019.10.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/22/2019] [Accepted: 10/25/2019] [Indexed: 11/26/2022]
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10
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Necessity of differentiating small (< 10 mm) and large (≥ 10 mm) PI-RADS 4. World J Urol 2019; 38:1473-1479. [PMID: 31468130 DOI: 10.1007/s00345-019-02924-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/20/2019] [Indexed: 12/12/2022] Open
Abstract
PURPOSE Prostate Imaging Reporting and Data System version 2 (PI-RADSv2) provides reasonable performance in detecting significant cancers. Still, it is unclear about whether all PI-RADS 4 lesions show the same cancer detection rate (CDR) regardless of tumor size. The aim was to compare the CDRs of small (< 10 mm) and large (≥ 10 mm) PI-RADS 4. METHODS After magnetic resonance imaging (MRI) was performed in 684 men, a radiologist interpreted the MR images and detected 281 index lesions categorized as PI-RADS 4 in 281 men. PI-RADS 4 lesions were divided into small and large groups on size of 10 mm. Overall and significant CDRs were compared between the groups. A significant cancer was defined as one with Gleason score (GS) ≥ 7 or tumor volume ≥ 0.5 ml. Tumor volumes were roughly calculated as πr34/3 (π = 3.14 and r = a half of tumor size) and were compared between the groups. Standard reference was a biopsy examination. Fisher's exact and Mann-Whitney tests were used for statistical analysis. RESULTS The overall CDRs of small and large groups were 39.0% (53/136) and 59.3% (86/145), respectively, (p = 0.0008). The median tumor volumes of cancer-proven small and large groups were 0.18 ml (0.01-0.38 ml) and 0.70 ml (0.52-1.44 ml), respectively (p < 0.0001). Using GS or tumor volume, the significant CDRs of these groups were 26.5% (36/136) and 59.3% (86/145), respectively (p < 0.0001), and using GS alone, 26.5% (36/136) and 39.3% (57/145), respectively (p = 0.0232). CONCLUSIONS PI-RADS 4 lesions should be sub-divided on size of 10 mm because of different significant CDRs.
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11
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Arnouil N, Gelet A, Matillon X, Rouviere O, Colombel M, Ruffion A, Mège-Lechevallier F, Subtil F, Badet L, Crouzet S. [Focal HIFU vs robot-assisted total prostatectomy: Functionnal and oncologic outcomes at one year]. Prog Urol 2018; 28:603-610. [PMID: 30243461 DOI: 10.1016/j.purol.2018.07.285] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 07/25/2018] [Accepted: 07/31/2018] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To analyse the functional and oncologic outcomes at one year of focal therapy with HIFU compared with total prostatectomy in patients with localised prostate cancer (PCa). PATIENTS AND METHODS Retrospective and monocentric study from 2008 to 2014 comparing 2 cohorts of patients with localised PCa (T1/T2 clinical stage, Gleason score≤3+4=7 and PSA<15ng/mL), one treated by focal therapy (HIFU-F group), one by robot-assisted total prostatectomy (RATP group). Primary outcome was a trifecta defined as: absence of urinary incontinence, erectile function with sexual relations without treatment, negative PSA with negative surgical margins (RATP group) or negative biopsy cores (HIFU-F group). RESULTS The 53 patients included in the "HIFU-F" group and the 66 patients in the "RATP" group were similar in terms of preoperative PSA, D'Amico risk group, erectile function but were different in terms of age, prostatic volume, length of cancer, Gleason score. Complication rate was not different. In multivariate analyse with propensity score, "HIFU-F" group achieved a better trifecta score than "RATP" group (OR=8,3, p=0,005). CONCLUSION In case of low or intermediate risk localised PCa, "HIFU-F" group had better functional outcomes than initial learning curse "RATP" group, at one year. A long-term evaluation by a common endpoint is necessary to judge the oncological equivalence of both techniques. LEVEL OF EVIDENCE 3.
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Affiliation(s)
- N Arnouil
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France.
| | - A Gelet
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France
| | - X Matillon
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France; Inserm U1060, CarMeN Laboratory, université de Lyon, université Claude-Bernard Lyon 1, 69100 Villeurbanne, France
| | - O Rouviere
- Service de radiologie, hospices Civils de Lyon, hôpital Edouard-Herriot, Lyon, France
| | - M Colombel
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France
| | - A Ruffion
- Service d'urologie, hospices Civils de Lyon, centre hospitalier Lyon-Sud, Pierre Bénite, France
| | - F Mège-Lechevallier
- Service d'anatomopathologie, hospices Civils de Lyon, hôpital Edouard-Herriot, Lyon, France
| | - F Subtil
- Service de biostatistique, laboratoire de biométrie et biologie évolutive UMR 5558, hospices civils de Lyon, université de Lyon, université Lyon 1, CNRS, Villeurbanne, France
| | - L Badet
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France
| | - S Crouzet
- Service d'urologie et chirurgie de la transplantation, hospices Civils de Lyon, hôpital Edouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France
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Jung SI, Jeon HJ, Park HS, Yu MH, Kim YJ, Lee SE, Lim SD. Multiparametric MR imaging of peripheral zone prostate cancer: effect of postbiopsy hemorrhage on cancer detection according to Gleason score and tumour volume. Br J Radiol 2018; 91:20180001. [PMID: 29493284 DOI: 10.1259/bjr.20180001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
OBJECTIVE To evaluate effect of postbiopsy hemorrhage on detection of peripheral zone (PZ) prostate cancer by multiparametric MR imaging according to Gleason score and tumor volume. METHODS This retrospective study included 54 biopsy-proven prostate cancer patients (median age, 67.0 years) who underwent multiparametric MR imaging. Two independent readers evaluated each sextant of the PZ using the PI-RADS v2. One reader recorded the presence or absence of hemorrhage per sextant on T1 weighted MR images. Areas under the receiver operating characteristic curves (AUCs) were used to evaluate cancer detection accuracy. RESULTS Postbiopsy hemorrhage was noted in 122 (37.7%) of 324 sextants of all patients. There was no significant difference in the AUC for detection of cancer with Gleason score ≥3 + 4 or volume ≥0.5 ml between sextants with and without hemorrhage (with hemorrhage, reader 1, 0.83 for Gleason score ≥3 + 4, 0.84 for tumor volume ≥0.5 ml; reader 2, 0.74 for Gleason score ≥3 + 4, 0.77 for tumor volume ≥0.5 ml; without hemorrhage, reader 1, 0.86 for Gleason score ≥3 + 4, 0.88 for tumor volume ≥0.5 ml; reader 2, 0.79 for Gleason score ≥3 + 4, 0.83 for tumor volume ≥0.5 ml; p > 0.2 for all). CONCLUSION Postbiopsy hemorrhage did not negatively affect the detection of clinically significant PZ prostate cancer on multiparametric MR imaging. Advances in knowledge: Under influence of postbiopsy hemorrhage, multiparametric MR can be useful for the detection of clinically significant PZ prostate cancer.
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Affiliation(s)
- Sung Il Jung
- 1 Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Korea
| | - Hae Jeong Jeon
- 1 Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Korea
| | - Hee Sun Park
- 1 Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Korea
| | - Mi Hye Yu
- 1 Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Korea
| | - Young Jun Kim
- 1 Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Korea
| | - Seung Eun Lee
- 2 Department of Pathology, Konkuk University Medical Center, Konkuk University School of Medicine , Seoul , Korea
| | - So Dug Lim
- 2 Department of Pathology, Konkuk University Medical Center, Konkuk University School of Medicine , Seoul , Korea
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Nyame YA, Grimberg DC, Greene DJ, Gupta K, Kartha GK, Berglund R, Gong M, Stephenson AJ, Magi-Galluzzi C, Klein EA. Genomic Scores are Independent of Disease Volume in Men with Favorable Risk Prostate Cancer: Implications for Choosing Men for Active Surveillance. J Urol 2018; 199:438-444. [DOI: 10.1016/j.juro.2017.09.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Yaw A. Nyame
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Dominic C. Grimberg
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Daniel J. Greene
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Karishma Gupta
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Ganesh K. Kartha
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Ryan Berglund
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Michael Gong
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Andrew J. Stephenson
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Cristina Magi-Galluzzi
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Eric A. Klein
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
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Nahlawi L, Goncalves C, Imani F, Gaed M, Gomez JA, Moussa M, Gibson E, Fenster A, Ward A, Abolmaesumi P, Shatkay H, Mousavi P. Stochastic Modeling of Temporal Enhanced Ultrasound: Impact of Temporal Properties on Prostate Cancer Characterization. IEEE Trans Biomed Eng 2017; 65:1798-1809. [PMID: 29989922 DOI: 10.1109/tbme.2017.2778007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Temporal enhanced ultrasound (TeUS) is a new ultrasound-based imaging technique that provides tissue-specific information. Recent studies have shown the potential of TeUS for improving tissue characterization in prostate cancer diagnosis. We study the temporal properties of TeUS-temporal order and length-and present a new framework to assess their impact on tissue information. METHODS We utilize a probabilistic modeling approach using hidden Markov models (HMMs) to capture the temporal signatures of malignant and benign tissues from TeUS signals of nine patients. We model signals of benign and malignant tissues (284 and 286 signals, respectively) in their original temporal order as well as under order permutations. We then compare the resulting models using the Kullback-Liebler divergence and assess their performance differences in characterization. Moreover, we train HMMs using TeUS signals of different durations and compare their model performance when differentiating tissue types. RESULTS Our findings demonstrate that models of order-preserved signals perform statistically significantly better (85% accuracy) in tissue characterization compared to models of order-altered signals (62% accuracy). The performance degrades as more changes in signal order are introduced. Additionally, models trained on shorter sequences perform as accurately as models of longer sequences. CONCLUSION The work presented here strongly indicates that temporal order has substantial impact on TeUS performance; thus, it plays a significant role in conveying tissue-specific information. Furthermore, shorter TeUS signals can relay sufficient information to accurately distinguish between tissue types. SIGNIFICANCE Understanding the impact of TeUS properties facilitates the process of its adopting in diagnostic procedures and provides insights on improving its acquisition.
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De Silva T, Cool DW, Yuan J, Romagnoli C, Samarabandu J, Fenster A, Ward AD. Robust 2-D-3-D Registration Optimization for Motion Compensation During 3-D TRUS-Guided Biopsy Using Learned Prostate Motion Data. IEEE TRANSACTIONS ON MEDICAL IMAGING 2017; 36:2010-2020. [PMID: 28499993 DOI: 10.1109/tmi.2017.2703150] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In magnetic resonance (MR)-targeted, 3-D transrectal ultrasound (TRUS)-guided biopsy, prostate motion during the procedure increases the needle targeting error and limits the ability to accurately sample MR-suspicious tumor volumes. The robustness of the 2-D-3-D registration methods for prostate motion compensation is impacted by local optima in the search space. In this paper, we analyzed the prostate motion characteristics and investigated methods to incorporate such knowledge into the registration optimization framework to improve robustness against local optima. Rigid motion of the prostate was analyzed adopting a mixture-of-Gaussian (MoG) model using 3-D TRUS images acquired at bilateral sextant probe positions with a mechanically assisted biopsy system. The learned motion characteristics were incorporated into Powell's direction set method by devising multiple initial search positions and initial search directions. Experiments were performed on data sets acquired during clinical biopsy procedures, and registration error was evaluated using target registration error (TRE) and converged image similarity metric values after optimization. After incorporating the learned initialization positions and directions in Powell's method, 2-D-3-D registration to compensate for motion during prostate biopsy was performed with rms ± std TRE of 2.33 ± 1.09 mm with ~3 s mean execution time per registration. This was an improvement over 3.12 ± 1.70 mm observed in Powell's standard approach. For the data acquired under clinical protocols, the converged image similarity metric value improved in ≥8% of the registrations whereas it degraded only ≤1% of the registrations. The reported improvements in optimization indicate useful advancements in robustness to ensure smooth clinical integration of a registration solution for motion compensation that facilitates accurate sampling of the smallest clinically significant tumors.
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Stefanovski D, Tang G, Wawrowsky K, Boston RC, Lambrecht N, Tajbakhsh J. Prostate cancer diagnosis using epigenetic biomarkers, 3D high-content imaging and probabilistic cell-by-cell classifiers. Oncotarget 2017; 8:57278-57301. [PMID: 28915670 PMCID: PMC5593641 DOI: 10.18632/oncotarget.18985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 06/02/2017] [Indexed: 11/29/2022] Open
Abstract
Background Prostate cancer (PCa) management can benefit from novel concepts/biomarkers for reducing the current 20-30% chance of false-negative diagnosis with standard histopathology of biopsied tissue. Method We explored the potential of selected epigenetic markers in combination with validated histopathological markers, 3D high-content imaging, cell-by-cell analysis, and probabilistic classification in generating novel detailed maps of biomarker heterogeneity in patient tissues, and PCa diagnosis. We used consecutive biopsies/radical prostatectomies from five patients for building a database of ∼140,000 analyzed cells across all tissue compartments and for model development; and from five patients and the two well-characterized HPrEpiC primary and LNCaP cancer cell types for model validation. Results Principal component analysis presented highest covariability for the four biomarkers 4′,6-diamidino-2-phenylindole, 5-methylcytosine, 5-hydroxymethylcytosine, and alpha-methylacyl-CoA racemase in the epithelial tissue compartment. The panel also showed best performance in discriminating between normal and cancer-like cells in prostate tissues with a sensitivity and specificity of 85%, correctly classified 87% of HPrEpiC as healthy and 99% of LNCaP cells as cancer-like, identified a majority of aberrant cells within histopathologically benign tissues at baseline diagnosis of patients that were later diagnosed with adenocarcinoma. Using k-nearest neighbor classifier with cells from an initial patient biopsy, the biomarkers were able to predict cancer stage and grade of prostatic tissue that occurred at later prostatectomy with 79% accuracy. Conclusion Our approach showed favorable diagnostic values to identify the portion and pathological category of aberrant cells in a small subset of sampled tissue cells, correlating with the degree of malignancy beyond baseline.
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Affiliation(s)
- Darko Stefanovski
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - George Tang
- Translational Cytomics Group, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kolja Wawrowsky
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Raymond C Boston
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Nils Lambrecht
- Pathology and Laboratory Medicine Service, Veterans Affairs Medical Center, Long Beach, CA, USA.,Department of Pathology and Laboratory Medicine, University of California Irvine, Orange, CA, USA
| | - Jian Tajbakhsh
- Translational Cytomics Group, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Elgqvist J. Nanoparticles as Theranostic Vehicles in Experimental and Clinical Applications-Focus on Prostate and Breast Cancer. Int J Mol Sci 2017; 18:E1102. [PMID: 28531102 PMCID: PMC5455010 DOI: 10.3390/ijms18051102] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/13/2017] [Accepted: 05/15/2017] [Indexed: 12/27/2022] Open
Abstract
Prostate and breast cancer are the second most and most commonly diagnosed cancer in men and women worldwide, respectively. The American Cancer Society estimates that during 2016 in the USA around 430,000 individuals were diagnosed with one of these two types of cancers, and approximately 15% of them will die from the disease. In Europe, the rate of incidences and deaths are similar to those in the USA. Several different more or less successful diagnostic and therapeutic approaches have been developed and evaluated in order to tackle this issue and thereby decrease the death rates. By using nanoparticles as vehicles carrying both diagnostic and therapeutic molecular entities, individualized targeted theranostic nanomedicine has emerged as a promising option to increase the sensitivity and the specificity during diagnosis, as well as the likelihood of survival or prolonged survival after therapy. This article presents and discusses important and promising different kinds of nanoparticles, as well as imaging and therapy options, suitable for theranostic applications. The presentation of different nanoparticles and theranostic applications is quite general, but there is a special focus on prostate cancer. Some references and aspects regarding breast cancer are however also presented and discussed. Finally, the prostate cancer case is presented in more detail regarding diagnosis, staging, recurrence, metastases, and treatment options available today, followed by possible ways to move forward applying theranostics for both prostate and breast cancer based on promising experiments performed until today.
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Affiliation(s)
- Jörgen Elgqvist
- Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, 413 45 Gothenburg, Sweden.
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden.
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Yuan R, Huang H. Re: Ernesto R. Cordeiro Feijoo, Arjun Sivaraman, Eric Barret, et al. Focal High-intensity Focused Ultrasound Targeted Hemiablation for Unilateral Prostate Cancer: A Prospective Evaluation of Oncologic and Functional Outcomes. Eur Urol 2016;69:214–20. Eur Urol 2017; 71:e147. [DOI: 10.1016/j.eururo.2016.10.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 10/26/2016] [Indexed: 10/20/2022]
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Hoquetis L, Malavaud B, Game X, Beauval JB, Portalez D, Soulie M, Rischmann P. MRI evaluation following partial HIFU therapy for localized prostate cancer: A single-center study. Prog Urol 2016; 26:517-23. [PMID: 27567745 DOI: 10.1016/j.purol.2016.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 06/11/2016] [Accepted: 07/22/2016] [Indexed: 02/07/2023]
Affiliation(s)
- L Hoquetis
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France.
| | - B Malavaud
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
| | - X Game
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
| | - J B Beauval
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
| | - D Portalez
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
| | - M Soulie
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
| | - P Rischmann
- Urology department, Rangueil university hospital, 1, avenue du Pr-Jean-Poulhes, 31059 Toulouse cedex, France
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Computed Tomography Perfusion of Prostate Cancer: Diagnostic Value of Quantitative Analysis. J Comput Assist Tomogr 2016; 40:740-5. [PMID: 27224230 DOI: 10.1097/rct.0000000000000432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The aim of the study was to assess the diagnostic value of computed tomography perfusion (CTp) of prostate in distinguishing between normal tissue and malignant lesion by using quantitative threshold values of CTp parameters. MATERIALS AND METHODS Sixty-one consecutive men with indication for radical prostatectomy were prospectively enrolled. All patients were intravenously injected with 80-mL bolus of nonionic iodinated contrast medium during cine-mode acquisition protocol. Perfusion data sets were analyzed by a dedicated software system and values for each of the 4 CTp parameters (blood volume, blood flow, mean transit time, and permeability surface-area product measurements) were recorded. Receiver operating characteristic curves were calculated to find which CTp parameter and which cutoff value might reveal the best diagnostic accuracy. Histopathology was used as reference standard. RESULTS Statistical correlation between radiological and pathological results was performed on 48 patients using 3456 segmented squares. Blood volume and permeability surface revealed the best diagnostic accuracy for differentiating between malignant and benign squares, with cutoff values of 6.1 and 16.5, respectively, and a sensitivity of 84.8% and 81.8%, respectively. All parameters showed also a high negative predictive value: 97.1% for blood volume and 95.4% for permeability surface. CONCLUSIONS Blood volume and permeability surface are the 2 CTp parameters with the highest diagnostic accuracy in differentiating between normal tissue and prostatic neoplasia. Due to the extremely high negative predictive value, they are particularly valuable in excluding the presence of cancer and thus resulting potentially useful in assessing cancer response to adjuvant therapy.
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Çalışkan S, Koca O, Akyüz M, Öztürk M, Karaman M. Clinical significance of single microscopic focus of adenocarcinoma at prostate biopsy. Prostate Int 2016; 3:132-4. [PMID: 26779460 PMCID: PMC4685238 DOI: 10.1016/j.prnil.2015.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 09/07/2015] [Indexed: 11/27/2022] Open
Abstract
Objective Prostate cancer (PC) is one of the most common cancer and an important reason of cancer specific death. The incidence of patients who diagnosed at low stage increased because of widespread using Prostate Specific Antigen (PSA) testing. We evaluated the patients who were diagnosed single microscopic focus of adenocarcinoma and treated radical prostatectomy at final pathology. Methods The patients who underwent transrectal ultrasound guided prostate biopsy between January 2004 and January 2012 were enrolled retrospectively. We extracted the patients who were diagnosed single microscopic focus of adenocarcinoma and treated with RP. Single microscopic adenocarcinoma was defined as one single focus measuring 3 mm or less, well differentiated (Gleason ≤6) adenocarcinoma. 37 patients were included at the study. Clinical data; including age, serum PSA levels, PSA density and prior biopsy and prostatectomy specimen results were recorded. In pathological examination; high molecular weight cytokeratin (HMW-CK), p63, and alpha-methylacyl-CoA racemase (AMACR) were used for differential diagnosis. Results The patients' ages were between 42 and 77 with a mean age of 64.9 ± 7.57 years. Mean PSA levels and prostate volumes were 8.03 ± 5.21 ng/ml and 54 ± 25.51 cc. T0, T2a, T2c and T3a were reported in 2 patients, 17 patients, 17 patients and 1 patient after pathological evaluation. According to the Gleason grading system; 6 patients were 7 (3 + 4), one patient was 7 (4 + 3), one patient was 5 (3 + 2) and 27 patients were 6 (3 + 3). Conclusion Small volume of cancer at prostate biopsy is not necessarily small cancer in radical prostatectomy. The treatment choice may be over or under treatment for some patients, so the patients must be informed when choosing the treatment.
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Affiliation(s)
- Selahattin Çalışkan
- Haydarpaşa Numune Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - Orhan Koca
- Haydarpaşa Numune Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - Mehmet Akyüz
- Haydarpaşa Numune Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - Metin Öztürk
- Haydarpaşa Numune Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - Muhammet Karaman
- Haydarpaşa Numune Training and Research Hospital, Department of Urology, Istanbul, Turkey
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Dantanarayana ND, Hossack T, Cozzi P, Brooks A, Lau H, Delprado W, Patel MI. Men under the age of 55 years with screen detected prostate cancer do not have less significant disease compared to older men in a population of patients in Australia. BMC Urol 2015; 15:124. [PMID: 26715039 PMCID: PMC4696233 DOI: 10.1186/s12894-015-0117-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 12/21/2015] [Indexed: 11/20/2022] Open
Abstract
Background The American Urological Association (AUA) changed their Prostate-Specific Antigen (PSA) screening guidelines in 2013 to not recommend testing in men under 55 years of age without significant risk factors (such as a family history of prostate cancer or African ethnicity). The AUA argues that the rates of 'insignificant' prostate cancer (PC) in men under 55 are so high that the potential harms of PSA-testing in this population (over diagnosis and overtreatment) outweigh the benefits (early detection and treatment). Our study aims to identify and compare the rates of insignificant and high-risk PC in men diagnosed with PC ≤55 years and >55 years in two centres in Sydney, Australia. Methods Men with an abnormal screening PSA or DRE and diagnosed with PC by prostate biopsy were included in this study. A consecutive series of men were accrued from two major urology centres between the years 2006 and 2014. The analysis was divided into two parts, the first compared PC biopsy characteristics between men aged ≤55 years and those >55 years. The second analysis compared the prostatectomy pathological characteristics between the two groups. Differences were analysed by Chi squared and significance set at p < 0.05. Results A total of 598 prostate biopsies and 723 prostatectomy matched subjects were included. On prostate biopsies, 14.0 % of men ≤55 years and 11.9 % of men >55 years had insignificant PC (X2 = 0.32, df = 1, p = 0.57), whilst 24.7 % of men ≤55 years and 25.1 % of men >55 years had high-risk PC (X2 = 0.007, df = 1, p = 0.93). On prostatectomy specimens, 9.1 % of men ≤55 years and 6.5 % of men >55 years had insignificant PC (X2 = 1.25, df = 1, p = 0.26), whilst 20.0 % of men ≤55 years and 24.0 % of men >55 years had high-risk PC (X2 = 0.83, df = 1, p = 0.36). Conclusion We found no significant difference in the rates of insignificant and high-risk PC between men ≤55 years and >55 years, in either the prostate biopsies or prostatectomy specimens. Further trials need to be performed with comparable sample sizes and controlling of risk factors to assess the utility of PSA screening in younger men.
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Affiliation(s)
| | - Tania Hossack
- Department of Urology, Westmead Hospital, Sydney, Australia
| | | | - Andrew Brooks
- University of Sydney, Discipline of Surgery, Sydney, Australia.,Department of Urology, Westmead Hospital, Sydney, Australia
| | - Howard Lau
- Department of Urology, Westmead Hospital, Sydney, Australia
| | | | - Manish I Patel
- University of Sydney, Discipline of Surgery, Sydney, Australia. .,Department of Urology, Westmead Hospital, Sydney, Australia.
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Imani F, Abolmaesumi P, Gibson E, Khojaste A, Gaed M, Moussa M, Gomez JA, Romagnoli C, Leveridge M, Chang S, Siemens DR, Fenster A, Ward AD, Mousavi P. Computer-Aided Prostate Cancer Detection Using Ultrasound RF Time Series: In Vivo Feasibility Study. IEEE TRANSACTIONS ON MEDICAL IMAGING 2015; 34:2248-2257. [PMID: 25935029 DOI: 10.1109/tmi.2015.2427739] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
UNLABELLED This paper presents the results of a computer-aided intervention solution to demonstrate the application of RF time series for characterization of prostate cancer, in vivo. METHODS We pre-process RF time series features extracted from 14 patients using hierarchical clustering to remove possible outliers. Then, we demonstrate that the mean central frequency and wavelet features extracted from a group of patients can be used to build a nonlinear classifier which can be applied successfully to differentiate between cancerous and normal tissue regions of an unseen patient. RESULTS In a cross-validation strategy, we show an average area under receiver operating characteristic curve (AUC) of 0.93 and classification accuracy of 80%. To validate our results, we present a detailed ultrasound to histology registration framework. CONCLUSION Ultrasound RF time series results in differentiation of cancerous and normal tissue with high AUC.
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24
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Dorin RP, Wiener S, Harris CD, Wagner JR. Prostate atypia: does repeat biopsy detect clinically significant prostate cancer? Prostate 2015; 75:673-8. [PMID: 25597982 DOI: 10.1002/pros.22950] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 11/26/2014] [Indexed: 11/11/2022]
Abstract
BACKGROUND While the treatment pathway in response to benign or malignant prostate biopsies is well established, there is uncertainty regarding the risk of subsequently diagnosing prostate cancer when an initial diagnosis of prostate atypia is made. As such, we investigated the likelihood of a repeat biopsy diagnosing prostate cancer (PCa) in patients in which an initial biopsy diagnosed prostate atypia. METHODS We reviewed our prospectively maintained prostate biopsy database to identify patients who underwent a repeat prostate biopsy within one year of atypia (atypical small acinar proliferation; ASAP) diagnosis between November 1987 and March 2011. Patients with a history of PCa were excluded. Chart review identified patients who underwent radical prostatectomy (RP), radiotherapy (RT), or active surveillance (AS). For some analyses, patients were divided into two subgroups based on their date of service. RESULTS Ten thousand seven hundred and twenty patients underwent 13,595 biopsies during November 1987-March 2011. Five hundred and sixty seven patients (5.3%) had ASAP on initial biopsy, and 287 (50.1%) of these patients underwent a repeat biopsy within one year. Of these, 122 (42.5%) were negative, 44 (15.3%) had atypia, 19 (6.6%) had prostatic intraepithelial neoplasia, and 102 (35.6%) contained PCa. Using modified Epstein's criteria, 27/53 (51%) patients with PCa on repeat biopsy were determined to have clinically significant tumors. 37 (36.3%) proceeded to RP, 25 (24.5%) underwent RT, and 40 (39.2%) received no immediate treatment. In patients who underwent surgery, Gleason grade on final pathology was upgraded in 11 (35.5%), and downgraded 1 (3.2%) patient. CONCLUSIONS ASAP on initial biopsy was associated with a significant risk of PCa on repeat biopsy in patients who subsequently underwent definitive local therapy. Patients with ASAP should be counseled on the probability of harboring both clinically significant and insignificant prostate cancer.
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Affiliation(s)
- Ryan P Dorin
- Urology Division, Hartford Hospital, Hartford, Connecticut, USA
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Yashi M, Mizuno T, Yuki H, Masuda A, Kambara T, Betsunoh H, Abe H, Fukabori Y, Muraishi O, Suzuki K, Nakazato Y, Kamai T. Prostate volume and biopsy tumor length are significant predictors for classical and redefined insignificant cancer on prostatectomy specimens in Japanese men with favorable pathologic features on biopsy. BMC Urol 2014; 14:43. [PMID: 24886065 PMCID: PMC4047262 DOI: 10.1186/1471-2490-14-43] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 05/21/2014] [Indexed: 12/17/2022] Open
Abstract
Background Gleason pattern 3 less often has molecular abnormalities and often behaves indolent. It is controversial whether low grade small foci of prostate cancer (PCa) on biopsy could avoid immediate treatment or not, because substantial cases harbor unfavorable pathologic results on prostatectomy specimens. This study was designed to identify clinical predictors for classical and redefined insignificant cancer on prostatectomy specimens in Japanese men with favorable pathologic features on biopsy. Methods Retrospective review of 1040 PCa Japanese patients underwent radical prostatectomy between 2006 and 2013. Of those, 170 patients (16.3%) met the inclusion criteria of clinical stage ≤ cT2a, Gleason score (GS) ≤ 6, up to two positive biopsies, and no more than 50% of cancer involvement in any core. The associations between preoperative data and unfavorable pathologic results of prostatectomy specimens, and oncological outcome were analyzed. The definition of insignificant cancer consisted of pathologic stage ≤ pT2, GS ≤ 6, and an index tumor volume < 0.5 mL (classical) or 1.3 mL (redefined). Results Pathologic stage ≥ pT3, upgraded GS, index tumor volume ≥ 0.5 mL, and ≥ 1.3 mL were detected in 25 (14.7%), 77 (45.3%), 83 (48.8%), and 53 patients (31.2%), respectively. Less than half of cases had classical (41.2%) and redefined (47.6%) insignificant cancer. The 5-year recurrence-free survival was 86.8%, and the insignificant cancers essentially did not relapse regardless of the surgical margin status. MRI-estimated prostate volume, tumor length on biopsy, prostate-specific antigen density (PSAD), and findings of magnetic resonance imaging were associated with the presence of classical and redefined insignificant cancer. Large prostate volume and short tumor length on biopsy remained as independent predictors in multivariate analysis. Conclusions Favorable features of biopsy often are followed by adverse pathologic findings on prostatectomy specimens despite fulfilling the established criteria. The finding that prostate volume is important does not simply mirror many other studies showing PSAD is important, and the clinical criteria for risk assessment before definitive therapy or active surveillance should incorporate these significant factors other than clinical T-staging or PSAD to minimize under-estimation of cancer in Japanese patients with low-risk PCa.
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Affiliation(s)
- Masahiro Yashi
- Department of Urology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi 321-0293, Japan.
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The accuracy of magnetic resonance imaging in prostate cancer staging: a single-institution experience. Ir J Med Sci 2014; 184:313-7. [DOI: 10.1007/s11845-014-1109-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 03/19/2014] [Indexed: 12/16/2022]
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Muller BG, Fütterer JJ, Gupta RT, Katz A, Kirkham A, Kurhanewicz J, Moul JW, Pinto PA, Rastinehad AR, Robertson C, de la Rosette J, Sanchez-Salas R, Jones JS, Ukimura O, Verma S, Wijkstra H, Marberger M. The role of magnetic resonance imaging (MRI) in focal therapy for prostate cancer: recommendations from a consensus panel. BJU Int 2013; 113:218-27. [PMID: 24215670 DOI: 10.1111/bju.12243] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To establish a consensus on the utility of multiparametric magnetic resonance imaging (mpMRI) to identify patients for focal therapy. METHODS Urological surgeons, radiologists, and basic researchers, from Europe and North America participated in a consensus meeting about the use of mpMRI in focal therapy of prostate cancer. The consensus process was face-to-face and specific clinical issues were raised and discussed with agreement sought when possible. All participants are listed among the authors. Topics specifically did not include staging of prostate cancer, but rather identifying the optimal requirements for performing MRI, and the current status of optimally performed mpMRI to (i) determine focality of prostate cancer (e.g. localising small target lesions of ≥0.5 mL), (ii) to monitor and assess the outcome of focal ablation therapies, and (iii) to identify the diagnostic advantages of new MRI methods. In addition, the need for transperineal template saturation biopsies in selecting patients for focal therapy was discussed, if a high quality mpMRI is available. In other words, can mpMRI replace the role of transperineal saturation biopsies in patient selection for focal therapy? RESULTS Consensus was reached on most key aspects of the meeting; however, on definition of the optimal requirements for mpMRI, there was one dissenting voice. mpMRI is the optimum approach to achieve the objectives needed for focal therapy, if made on a high quality machine (3T with/without endorectal coil or 1.5T with endorectal coil) and judged by an experienced radiologist. Structured and standardised reporting of prostate MRI is paramount. State of the art mpMRI is capable of localising small tumours for focal therapy. State of the art mpMRI is the technique of choice for follow-up of focal ablation. CONCLUSIONS The present evidence for MRI in focal therapy is limited. mpMRI is not accurate enough to consistently grade tumour aggressiveness. Template-guided saturation biopsies are no longer necessary when a high quality state of the art mpMRI is available; however, suspicious lesions should always be confirmed by (targeted) biopsy.
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Affiliation(s)
- Berrend G Muller
- Department of Urology, AMC University Hospital, Amsterdam, the Netherlands
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Klatte T, Swietek N, Schatzl G, Waldert M. Transperineal template-guided biopsy for diagnosis of prostate cancer in patients with at least two prior negative biopsies. Wien Klin Wochenschr 2013; 125:669-73. [PMID: 24061696 DOI: 10.1007/s00508-013-0421-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 08/12/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To evaluate the prostate cancer (PCa) detection rate, PCa location, PCa significance and complications of a standardized 24-core template-guided transperineal biopsy (TPB) approach in patients with at least two negative transrectal biopsies. METHODS We prospectively recruited 50 men who had at least two negative transrectal ultrasound-guided extended biopsies in the past 24 months, a prostate-specific antigen (PSA) < 20 ng/mL, a prostate volume < 100 mL, and life expectancy of at least 90 % at 10 years. All patients underwent a standardized 24-core template-guided TPB biopsy. The PCa detection rate, PCa location, PCa significance, and complications were recorded. RESULTS Median age was 57.5 years and the median PSA level was 7.3 ng/ml. PCa was detected in 24 patients (48 %). The anterior zone was involved in 16 (32 %) PCa. Six PCa (25 %) were insignificant. Biopsy related complications occurred in 2 patients (4 %). CONCLUSIONS A 24-core TPB is a safe procedure with a high PCa detection rate. Few of the detected PCa are clinically insignificant. Men with at least two negative transrectal biopsies may be counseled to undergo TPB.
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Affiliation(s)
- Tobias Klatte
- Department of Urology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
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29
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Is an Extended 20-Core Prostate Biopsy Protocol More Efficient than the Standard 12-Core? A Randomized Multicenter Trial. J Urol 2013; 190:77-83. [DOI: 10.1016/j.juro.2012.12.109] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/26/2012] [Indexed: 11/20/2022]
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Kollmeier MA, Zelefsky MJ. How to select the optimal therapy for early-stage prostate cancer. Crit Rev Oncol Hematol 2013; 84 Suppl 1:e6-e15. [PMID: 23273666 DOI: 10.1016/j.critrevonc.2012.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2011] [Indexed: 11/16/2022] Open
Abstract
Selecting the "optimal therapy" for the patient with localized prostate cancer may be one of the most challenging medical decisions facing the oncologist. Most patients will have a number of appropriate therapeutic options available to them. Before determining which therapy is most appropriate for a patient, a critical question which needs to be asked is whether any therapy is necessary, especially for those who present with early-stage, low-grade, low-volume disease. Furthermore, given the lack of randomized trials available to guide physicians regarding the superiority of one therapy over another, it is important to consider the different side-effect profiles relevant for each treatment modality. The potential toxicities of therapy impact quality-of-life outcomes and play an important role for most patients in their individual selection of a particular therapy. In addition, there are other important issues that need to be considered, which include the medical condition of the patient and emotional and psychological considerations, as well as family/peer viewpoints or perceived notions of a particular therapy. This review will discuss the relevant issues in the decision making and treatment selection for the patient.
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Affiliation(s)
- Marisa A Kollmeier
- Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, 1275 York Ave, New York, NY 10065, USA
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Potential Consequences of Low Biopsy Core Number in Selection of Patients With Prostate Cancer for Current Active Surveillance Protocols. Urology 2013; 81:837-42. [DOI: 10.1016/j.urology.2012.10.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 09/24/2012] [Accepted: 10/15/2012] [Indexed: 11/24/2022]
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Overview of dynamic contrast-enhanced MRI in prostate cancer diagnosis and management. AJR Am J Roentgenol 2012; 198:1277-88. [PMID: 22623539 DOI: 10.2214/ajr.12.8510] [Citation(s) in RCA: 211] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE This article is a primer on the technical aspects of performing a high-quality dynamic contrast-enhanced MRI (DCE-MRI) examination of the prostate gland. CONCLUSION DCE-MRI is emerging as a useful clinical technique as part of a multi-parametric approach for evaluating the extent of primary and recurrent prostate cancer. Performing a high-quality DCE-MRI examination requires a good understanding of the technical aspects and limitations of image acquisition and postprocessing techniques.
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How to select the optimal therapy for early-stage prostate cancer. Crit Rev Oncol Hematol 2012; 83:225-34. [DOI: 10.1016/j.critrevonc.2011.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 08/05/2011] [Accepted: 11/04/2011] [Indexed: 11/20/2022] Open
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Can a Gleason 6 or Less Microfocus of Prostate Cancer in One Biopsy and Prostate-Specific Antigen Level <10 ng/mL Be Defined as the Archetype of Low-Risk Prostate Disease? JOURNAL OF ONCOLOGY 2012; 2012:645146. [PMID: 22848218 PMCID: PMC3403479 DOI: 10.1155/2012/645146] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 04/21/2012] [Indexed: 11/30/2022]
Abstract
Prostate cancer (PC) remains a cause of death worldwide. Here we investigate whether a single microfocus of PC at the biopsy (graded as Gleason 6 or less, ≤5% occupancy) and the PSA <10 ng/mL can define the archetype of low-risk prostate disease. 4500 consecutive patients were enrolled. Among them, 134 patients with a single micro-focus of PC were followed up, and the parameters influencing the biochemical relapse (BR) were analysed. Out of 134 patients, 94 had clinically significant disease, specifically in 74.26% of the patients with PSA <10 ng/mL. Positive surgical margins and the extracapsular invasion were found in 29.1% and 51.4% patients, respectively. BR was observed in 29.6% of the patients. Cox regression evidenced a correlation between the BR and Gleason grade at the retropubic radical prostatectomy (RRP), capsular invasion, and the presence of positive surgical margins. Multivariate regression analysis showed a statistically significant correlation between the presence of surgical margins at the RRP and BR. Considering a single micro-focus of PC at the biopsy and PSA serum level <10 ng/mL, clinically significant disease was found in 74.26% patients and only positive surgical margins are useful for predicting the BR.
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Formalized prediction of clinically significant prostate cancer: is it possible? Asian J Androl 2012; 14:349-54. [PMID: 22367181 DOI: 10.1038/aja.2011.140] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Greater understanding of the biology and epidemiology of prostate cancer in the last several decades have led to significant advances in its management. Prostate cancer is now detected in greater numbers at lower stages of disease and is amenable to multiple forms of efficacious treatment. However, there is a lack of conclusive data demonstrating a definitive mortality benefit from this earlier diagnosis and treatment of prostate cancer. It is likely due to the treatment of a large proportion of indolent cancers that would have had little adverse impact on health or lifespan if left alone. Due to this overtreatment phenomenon, active surveillance with delayed intervention is gaining traction as a viable management approach in contemporary practice. The ability to distinguish clinically insignificant cancers from those with a high risk of progression and/or lethality is critical to the appropriate selection of patients for surveillance protocols versus immediate intervention. This chapter will review the ability of various prediction models, including risk groupings and nomograms, to predict indolent disease and determine their role in the contemporary management of clinically localized prostate cancer.
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