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Tale of two zones: investigating the clinical outcomes and research gaps in peripheral and transition zone prostate cancer through a systematic review and meta-analysis

Ali, A.
; 
Elumalai, T.
; 
Venkatesulu, B.
; 
Hekman, L.
; 
Mistry, H.
; 
Sachdeva, A.
; 
Oliveira, P.
; 
Clarke, N.
; 
Baena, E.
; 
Choudhury, A.
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Abstract
OBJECTIVE: To assess pathological characteristics, clinical features and outcomes of patients diagnosed with peripheral zone (PZ) and transition zone (TZ) prostate cancer after prostatectomy. METHODS AND ANALYSIS: We systematically reviewed PubMed, EMBASE and MEDLINE. Primary endpoints were biochemical relapse-free survival (bRFS) and distant metastases rate; secondary endpoints included clinical and pathological features. RESULTS: Ten retrospective cohort studies were identified, six reported HRs for bRFS between PZ and TZ tumours. Patients with TZ tumours had significantly better bRFS (pooled HR 0.57 (0.47, 0.68)) than those with PZ tumours. Two studies reported a lower proportion of distant metastasis in patients diagnosed with TZ tumours compared with PZ tumours (1.5% vs 4.9% (median follow-up 7.0 years) and 0% vs 5% (median follow-up 7.8 years)). PZ tumours presented higher Gleason group and T staging more frequently, while TZ tumours were associated with higher prostate specific antigen levels at diagnosis. CONCLUSION: PZ tumours were associated with poorer prognostic clinical features and outcomes. Despite adjusting for poor prognostic clinical features, PZ tumours consistently showed worse clinical outcomes than TZ tumours. Our systematic review underscores the need for further research comparing PZ and TZ prostate cancer to understand the underlying differences and refine clinical practice.
Authors
Ali, A.
Elumalai, T.
Venkatesulu, B.
Hekman, L.
Mistry, H.
Sachdeva, A.
Oliveira, P.
Clarke, N.
Baena, E.
Choudhury, A.
Bristow, R. G.
Affiliation
Oncology Department, Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK. Department of Clinical Oncology, The Christie NHS Foundation Trust, Manchester, UK. Prostate Oncobiology, Cancer Research UK Manchester Centre, The University of Manchester, Manchester, UK. Translational Oncogenomics, Cancer Research UK Manchester Centre, The University of Manchester, Manchester, UK. Oncology Department, Addenbrooke's Hospital, Cambridge, UK. Radiation Oncology Department, Loyola University Chicago, Chicago, Illinois, USA. Department of Urology, Loyola University Chicago, Chicago, Illinois, USA. School of Health Sciences, The University of Manchester, Manchester, UK. Department of Surgery, The Christie Hospital NHS Trust, Manchester, UK. Division of Cancer Sciences, The University of Manchester, Manchester, UK. Department of Urology, Salford Royal NHS Foundation Trust, Salford, UK. Department of Pathology, The Christie Hospital NHS Trust, Manchester, UK.
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2024
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Ali A, Elumalai T, Venkatesulu B, Hekman L, Mistry H, Sachdeva A, et al. Tale of two zones: investigating the clinical outcomes and research gaps in peripheral and transition zone prostate cancer through a systematic review and meta-analysis. BMJ oncology. 2024;3(1):e000193. PubMed PMID: 39886173. Pubmed Central PMCID: PMC11234997. Epub 2025/01/31. eng.
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https://christie.openrepository.com/handle/10541/628137
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