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Undifferentiated carcinoma of the pancreas with osteoclast-like giant cells localized in the main pancreatic duct without extraductal invasion: a case report and literature review. Cureus 2025; 17: e80592.","DOI":"10.7759\/cureus.80592"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8) Yonghao O, Li Z, Xiao Y, et al. The survival benefits of chemotherapy for undifferentiated carcinoma with osteoclast-like giant cells of pancreas: a retrospective analysis and individual participant data meta-analysis. Cancer Med 2025; 14: e70894.","DOI":"10.1002\/cam4.70894"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9) Muraki T, Reid MD, Basturk O, et al. Undifferentiated carcinoma with osteoclastic giant cells of the pancreas: clinicopathologic analysis of 38 cases highlights a more protracted clinical course than currently appreciated. Am J Surg Pathol 2016; 40: 1203\u201316.","DOI":"10.1097\/PAS.0000000000000689"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10) Gayibov E, Sychra T, Sou\u010dek P, et al. A current knowledge of the undifferentiated carcinoma of the pancreas with osteoclast-like giant cells: a narrative review. J Gastrointest Oncol 2025; 16: 281\u201391.","DOI":"10.21037\/jgo-24-780"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11) Kobayashi S, Nakano H, Ooike N, et al. Long-term survivor of a resected undifferentiated pancreatic carcinoma with osteoclast-like giant cells who underwent a second curative resection: a case report and review of the literature. Oncol Lett 2014; 8: 1499\u2013504.","DOI":"10.3892\/ol.2014.2325"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12) Nitta T, Fujii K, Kataoka J, et al. A case of long-term 24-month survival in pancreatic anaplastic carcinoma (giant cell type) after S1 postoperative adjuvant chemotherapy. Int J Surg Case Rep 2016; 23: 134\u20137.","DOI":"10.1016\/j.ijscr.2016.04.013"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13) Luchini C, Cros J, Pea A, et al. PD-1, PD-L1, and CD163 in pancreatic undifferentiated carcinoma with osteoclast-like giant cells: expression patterns and clinical implications. Hum Pathol 2018; 81: 157\u201365.","DOI":"10.1016\/j.humpath.2018.07.006"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14) Hrudka J, Lawrie K, Waldauf P, et al. Negative prognostic impact of PD-L1 expression in tumor cells of undifferentiated (anaplastic) carcinoma with osteoclast-like giant cells of the pancreas: study of 13 cases comparing ductal pancreatic carcinoma and review of the literature. Virchows Arch 2020; 477: 687\u201396.","DOI":"10.1007\/s00428-020-02830-8"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15) Obayashi M, Shibasaki Y, Koakutsu T, et al. Pancreatic undifferentiated carcinoma with osteoclast-like giant cells curatively resected after pembrolizumab therapy for lung metastases: a case report. BMC Gastroenterol 2020; 20: 220.","DOI":"10.1186\/s12876-020-01362-4"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16) Besaw RJ, Terra AR, Malvar GL, et al. Durable response to PD-1 blockade in a patient with metastatic pancreatic undifferentiated carcinoma with osteoclast-like giant cells. 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