{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T07:19:07Z","timestamp":1768288747526,"version":"3.49.0"},"reference-count":33,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,5,26]],"date-time":"2020-05-26T00:00:00Z","timestamp":1590451200000},"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>Neuroendocrine neoplasms (NENs) are the most common tumor of the appendix and have an excellent prognosis. Appendiceal tumors diagnosed between 1989 and 2019 were reviewed, and clinical data were collected from patient files. Part of the series was immuno-profiled for markers related to cell cycle proliferation and\/or senescence-type, apoptotic, and metastatic potential. Appendix NENs were detected in 74 patients, with 0.47% of incidence per appendectomy. The median age of the patients was 21.5 years, with two age peaks of incidence at 17.0 and 55.2 years. The median tumors size was 5.8 mm, and most were smaller than 10 mm. Lymphovascular and perineural invasion, as well as necrosis, was associated with larger tumor size. G1 tumors composed 96.0% of the cohort. The presence of moderate\/strong p16 and the absent\/low Bcl-2 expression was frequently observed and associated with a smaller size. This study represents one of the largest cohorts and with a long follow-up. For tumors smaller than 10 mm appendicectomy was sufficient as a curative procedure, as revealed by the good outcome. This series presented a 100% disease-free survival. The indolent phenotype of appendix NENs is supported by the expression of markers that point towards a strong inhibition of cell replication and growth inhibition.<\/jats:p>","DOI":"10.3390\/cancers12061357","type":"journal-article","created":{"date-parts":[[2020,5,29]],"date-time":"2020-05-29T00:44:02Z","timestamp":1590713042000},"page":"1357","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["A 30-Year Long-Term Experience in Appendix Neuroendocrine Neoplasms\u2014Granting a Positive Outcome"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0871-1427","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Vinagre","sequence":"first","affiliation":[{"name":"Instituto de Investiga\u00e7\u00e3o e Inova\u00e7\u00e3o em Sa\u00fade (i3S), 4200-135 Porto, Portugal"},{"name":"Instituto de Patologia e Imunologia Molecular da Universidade do Porto (Ipatimup), 4200-135 Porto, Portugal"},{"name":"Faculdade de Medicina da Universidade do Porto (FMUP), 4200-139 Porto, Portugal"},{"name":"Departmento de Patologia e Oncologia, Centro Hospitalar e Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200-139 Porto, Portugal"}]},{"given":"Jorge","family":"Pinheiro","sequence":"additional","affiliation":[{"name":"Faculdade de Medicina da Universidade do Porto (FMUP), 4200-139 Porto, Portugal"},{"name":"Departmento de Patologia e Oncologia, Centro Hospitalar e Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200-139 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3221-0403","authenticated-orcid":false,"given":"Olga","family":"Martinho","sequence":"additional","affiliation":[{"name":"Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"Biomaterials, Biodegradables and Biomimetics (3Bs-PT), Government Associate Laboratory, 4805-017 Guimar\u00e3es, Portugal"},{"name":"Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, S\u00e3o Paulo 14784 400, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9639-7940","authenticated-orcid":false,"given":"Rui Manuel","family":"Reis","sequence":"additional","affiliation":[{"name":"Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"},{"name":"Biomaterials, Biodegradables and Biomimetics (3Bs-PT), Government Associate Laboratory, 4805-017 Guimar\u00e3es, Portugal"},{"name":"Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, S\u00e3o Paulo 14784 400, Brazil"}]},{"given":"John","family":"Preto","sequence":"additional","affiliation":[{"name":"Faculdade de Medicina da Universidade do Porto (FMUP), 4200-139 Porto, Portugal"},{"name":"Department of Surgery, Centro Hospitalar e Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200-139 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9607-6998","authenticated-orcid":false,"given":"Paula","family":"Soares","sequence":"additional","affiliation":[{"name":"Instituto de Investiga\u00e7\u00e3o e Inova\u00e7\u00e3o em Sa\u00fade (i3S), 4200-135 Porto, Portugal"},{"name":"Instituto de Patologia e Imunologia Molecular da Universidade do Porto (Ipatimup), 4200-135 Porto, Portugal"},{"name":"Faculdade de Medicina da Universidade do Porto (FMUP), 4200-139 Porto, Portugal"},{"name":"Departmento de Patologia e Oncologia, Centro Hospitalar e Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200-139 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8597-3474","authenticated-orcid":false,"given":"Jos\u00e9 Manuel","family":"Lopes","sequence":"additional","affiliation":[{"name":"Instituto de Investiga\u00e7\u00e3o e Inova\u00e7\u00e3o em Sa\u00fade (i3S), 4200-135 Porto, Portugal"},{"name":"Instituto de Patologia e Imunologia Molecular da Universidade do Porto (Ipatimup), 4200-135 Porto, Portugal"},{"name":"Faculdade de Medicina da Universidade do Porto (FMUP), 4200-139 Porto, Portugal"},{"name":"Departmento de Patologia e Oncologia, Centro Hospitalar e Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200-139 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,5,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1007\/BF02236899","article-title":"Appendiceal tumors: Retrospective clinicopathologic analysis of appendiceal tumors from 7970 appendectomies","volume":"41","author":"Connor","year":"1998","journal-title":"Dis. 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