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Although the incidence of delayed neck metastasis is rare, it may occur after the surgery and is known to be the most important factor in the prognosis. The purpose of is study is to evaluate the clinical and histopathological factors associated with delayed neck metastasis case among patients.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A total of 195 patients who underwent surgical treatment for OSCC from 2016 to 2022 were investigated. Among them, delayed neck metastasis (DNM) was analyzed. The criterion for delayed neck metastasis was a newly developed neck lesion after the primary operation without neck dissection in cN0 necks. To identify the correlation between prognostic factors and the incidence of delayed neck metastasis, <jats:italic>\u03c7<\/jats:italic><jats:sup>2<\/jats:sup> analysis with phi correlation and Cramer\u2019s <jats:italic>V<\/jats:italic> test was performed. Cumulative survival rates (CRS) were compared between the groups with the incidence of DNM and without DNM. Also, the log rank test for CSR and Cox proportional hazard model was analyzed to estimate the significance of the CSR and confirm the correlations between prognostic factors and DNM.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Result<\/jats:title>\n                <jats:p>Among 195 patients, 14 were discovered to have DNM. The primary tumor locations were the tongue (<jats:italic>n<\/jats:italic>\u2009=\u20095), floor of the mouth (<jats:italic>n<\/jats:italic>\u2009=\u20092), mandibular gingiva (<jats:italic>n<\/jats:italic>\u2009=\u20091), maxillary gingiva (<jats:italic>n<\/jats:italic>\u2009=\u20094), retromolartrigone (<jats:italic>n<\/jats:italic>\u2009=\u20091), and buccal mucosa (<jats:italic>n<\/jats:italic>\u2009=\u20092) each. The cases consisted of TNM stage I (<jats:italic>n<\/jats:italic>\u2009=\u20091), stage II (<jats:italic>n<\/jats:italic>\u2009=\u20093), stage III (<jats:italic>n<\/jats:italic>\u2009=\u20093), and stage IV (<jats:italic>n<\/jats:italic>\u2009=\u20098), respectively. The result of the <jats:italic>\u03c7<\/jats:italic><jats:sup>2<\/jats:sup> analysis identified a correlation between positive neck (<jats:italic>p<\/jats:italic>\u2009=\u20090.01), depth of invasion (<jats:italic>p<\/jats:italic>\u2009=\u20090.09), radiation therapy (<jats:italic>p<\/jats:italic>\u2009=\u20090.003), and DNM. Groups without DNM showed better prognosis compared to groups with DNM. Regarding positive neck, depth of invasion, and radiation therapy, only depth of invasion showed significance in CSR analysis.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>DNM after surgical treatment of OSCC is a rare event, and few were found in a review of the literature. Also, many prognostic factors have been suggested but controversial. However, in our study, some prognostic factors have been identified to have a significant correlation with the incidence of DNM, and analysis of such factors provides important information predicting neck metastasis and the prognosis.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s40902-024-00430-z","type":"journal-article","created":{"date-parts":[[2024,6,17]],"date-time":"2024-06-17T07:01:46Z","timestamp":1718607706000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Identifying factors related to delayed neck metastasis after surgical treatment in patients with oral squamous cell carcinoma"],"prefix":"10.1186","volume":"46","author":[{"given":"Sang-Min","family":"Lee","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyosik","family":"Kim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7840-4254","authenticated-orcid":false,"given":"Kang-Min","family":"Ahn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,6,17]]},"reference":[{"key":"430_CR1","doi-asserted-by":"publisher","first-page":"408","DOI":"10.1097\/MLG.0b013e31815d8e15","volume":"118","author":"A Bilde","year":"2008","unstructured":"Bilde A, von Buchwald C, Therkildsen MH et al (2008) Need for intensive histopathologic analysis to determine lymph node metastases when using sentinel node biopsy in oral cancer. 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