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    Prognostic factors for relapse in resected gastroenteropancreatic neuroendocrine neoplasms: A systematic review and meta-analysis

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    Authors
    Broadbent, Rachel
    Wheatley, Roseanna
    Stajer, S.
    Jacobs, Timothy
    Lamarca, Angela
    Hubner, Richard A
    Valle, Juan W
    Amir, E.
    McNamara, Mairead G
    Affiliation
    University of Manchester, Division of Cancer Sciences, Manchester M20 4BX, UK; Department of Medical Oncology, The Christie NHS Foundation Trust, Manchester M20 4BX
    Issue Date
    2021
    
    Metadata
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    Abstract
    Background: Gastroenteropancreatic neoplasms (GEP-NENs)can potentially be cured through surgical resection, but only 42-57% achieve 5-year disease-free survival.There is a lack of consensus regarding the factorsassociated withrelapse followingresection ofGEP-NENs. Methods: Asystematic review identified studies reporting factors associated with relapse in patients with GEP-NENs following resection of a primary tumour. Meta-analysis was performed to identify the factors prognostic for relapse-free survival (RFS)oroverall survival (OS). Results: 63 studies comprising 13,715 patients were included; 56 studies reported on pancreatic NENs (12,418 patients), 24 reported on patients with grade 1-2 tumours (4,735 patients). Median follow-up was 44.2 months, median RFS was 32 months. Pooling of multivariable analyses of GEP-NENs (all sites and grades) found the following factors predicted worse RFS (all p values < 0.05): vascular resection performed, metastatic disease resected, grade 2 disease, grade 3 disease, tumour size > 20 mm, R1 resection, microvascular invasion, perineural invasion, Ki-67 > 5% and any lymph node positivity. In a subgroup of studies comprising exclusively of grade 1-2 GEP-NENs, R1 resection, perineural invasion, grade 2 disease, any lymph node positivity and tumour size > 20 mm predicted worse RFS (all p values < 0.05). Few OSdata were available for pooling; in univariableanalysis(entire cohort), grade 2 predicted worse OS (p = 0.007), whileR1 resectiondid not (p = 0.14). Conclusions: The factors prognostic for worse RFS following resection of a GEP-NEN identified in this meta-analysis could be included in post-curative treatment surveillance clinical guidelines and inform the stratification and inclusion criteria of future adjuvant trials.
    Citation
    Broadbent R, Wheatley R, Stajer S, Jacobs T, Lamarca A, Hubner RA, et al. Prognostic factors for relapse in resected gastroenteropancreatic neuroendocrine neoplasms: A systematic review and meta-analysis. Vol. 101, Cancer Treatment Reviews. Elsevier BV; 2021. p. 102299.
    Journal
    Cancer Treatment Reviews
    URI
    http://hdl.handle.net/10541/624660
    DOI
    10.1016/j.ctrv.2021.102299
    PubMed ID
    34662810
    Additional Links
    https://dx.doi.org/10.1016/j.ctrv.2021.102299
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ctrv.2021.102299
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