{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T14:29:13Z","timestamp":1787495353660,"version":"build-2736575974"},"reference-count":66,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,1,10]],"date-time":"2025-01-10T00:00:00Z","timestamp":1736467200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancers"],"abstract":"<jats:p>Background: Neuroendocrine neoplasms (NENs) are a heterogeneous group of tumors with unique biological characteristics and complications, including thromboembolism. This systematic review evaluates the incidence, types, and clinical outcomes of venous thromboembolic events (VTEs) in NEN patients. Methods: A systematic search of PubMed, Scopus, and Embase was conducted to identify studies on TEs in NENs. Eligible studies included case reports, case series, and retrospective cohort studies reporting VTEs, including deep vein thrombosis (DVT), pulmonary embolism (PE), and visceral vein thrombosis (VVT). Data were extracted on tumor site, functionality, differentiation grade, and VTE type. Results: In total, 33 studies were included, comprising 26 case reports, 2 case series, and 5 retrospective cohort studies. VTE prevalence ranged from 7.5% to 33% across studies. The most common VTEs were DVT, PE, and portal vein thrombosis (PVT). A meta-analysis revealed a pooled VTE prevalence of 11.1% (95% CI: 9.07\u201313.53%). Pancreatic NENs exhibited the highest thrombotic burden, particularly in poorly differentiated and advanced-stage tumors. Functioning tumors, including glucagonomas and ACTH-secreting NENs, were strongly associated with VTEs, potentially related to their systemic effects on coagulation and inflammation. Conclusions: Venous thromboembolism is a significant complication in NEN patients, especially in advanced or poorly differentiated tumors. Early detection and targeted management are critical for improving outcomes. Further investigations are required to clarify the mechanisms underlying thromboembolism in NENs and to develop optimized prophylactic and therapeutic strategies tailored to this patient population.<\/jats:p>","DOI":"10.3390\/cancers17020212","type":"journal-article","created":{"date-parts":[[2025,1,10]],"date-time":"2025-01-10T06:25:54Z","timestamp":1736490354000},"page":"212","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Venous Thromboembolism in Patients with Neuroendocrine Neoplasms: A Systematic Review of Incidence, Types, and Clinical Outcomes"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3214-8192","authenticated-orcid":false,"given":"Sara","family":"Massironi","sequence":"first","affiliation":[{"name":"Faculty of Medicine and Surgery Via Olgettina, Vita e Salute San Raffaele University, 56, 20132 Milan, Italy"},{"name":"Gastroenterology Unit, Istituti Ospedalieri Bergamaschi, 24046 Bergamo, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3313-8527","authenticated-orcid":false,"given":"Lorenzo","family":"Gervaso","sequence":"additional","affiliation":[{"name":"Division of Gastrointestinal Medical Oncology and Neuroendocrine Tumors, European Institute of Oncology (IEO) IRCCS, Via Ripamonti, 435, 20141 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-1198-6121","authenticated-orcid":false,"given":"Fabrizio","family":"Fanizzi","sequence":"additional","affiliation":[{"name":"Faculty of Medicine and Surgery Via Olgettina, Vita e Salute San Raffaele University, 56, 20132 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6515-7960","authenticated-orcid":false,"given":"Paoletta","family":"Preatoni","sequence":"additional","affiliation":[{"name":"Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele, Via Olgettina, 56, 20132 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9395-5468","authenticated-orcid":false,"given":"Giuseppe","family":"Dell\u2019Anna","sequence":"additional","affiliation":[{"name":"Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele, Via Olgettina, 56, 20132 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6869-0704","authenticated-orcid":false,"given":"Nicola","family":"Fazio","sequence":"additional","affiliation":[{"name":"Division of Gastrointestinal Medical Oncology and Neuroendocrine Tumors, European Institute of Oncology (IEO) IRCCS, Via Ripamonti, 435, 20141 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7341-1351","authenticated-orcid":false,"given":"Silvio","family":"Danese","sequence":"additional","affiliation":[{"name":"Faculty of Medicine and Surgery Via Olgettina, Vita e Salute San Raffaele University, 56, 20132 Milan, Italy"},{"name":"Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele, Via Olgettina, 56, 20132 Milan, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Sultana, Q., Kar, J., Verma, A., Sanghvi, S., Kaka, N., Patel, N., Sethi, Y., Chopra, H., Kamal, M.A., and Greig, N.H. 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