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- W2891713445 abstract "e15721 Background: Recent studies indicate that pancreatic cancer stem cells (CSC) may predict disease behavior and survival outcomes of pancreatic ductal adenocarcinomas (PDACs) patients (pts). Several CSC markers have been reported in PDAC (Fitzgerald, TL, 2014). We herein evaluated the impact of CSC markers including CD44 and Epithelial Specific Antigen (ESA) on survival outcome of PDAC pts who had liver or lung metastasis after initial surgical resection (IR). Methods: Clinicopathologic features and survival of 59 PDACs were analyzed. Pts with IRB approval, and whom had available primary tumor tissue, were included. All neoplasms were immuno labeled with CD44 and ESA. Staining intensity was scored as weak (1), moderate (2), strong (3), while the staining pattern was scored as: few (1), patchy (2), and diffuse (3). The expression for CD44 and ESA was accepted positive if total score ≥4. Time from relapse to death (TRD) was estimated using the Kaplan-Meier method censoring patients that were alive at the last follow up. Survival curves were compared using the log-rank test Results: Of 59 pts, 42 (71 %) had liver, 10 (17%) had lung and 7 (12%) had both liver and lung metastasis. M/F = 34/25; mean age = 64.2 (range, 34-90). Patients were subcategorized as follows; thirteen cases were CD44 (+)/ESA (-) (group1) and 13 were CD44 (-)/ESA (+) (group 2). Eight (61.5%) of group 1 tumors and 2 (15.3%) of group 2 were poorly differentiated. At last follow-up, except one with 63 months survival, all pts died of disease with 23.3 months (range, 3-67) median OS. No significant difference in TRD was observed between group 1 (6.9 months) and 2 (13.8 months) (p = 0.62). However, we observed group 1 tumors had worse OS (12 months) compared to group 2 (36 months). Conclusions:A worse outcome trend was observed for pts with CD44 (+)/ESA (-), albeit not statistically significant and likely limited by small numbers. Further studies are warranted to evaluate the robustness of this observation." @default.
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- W2891713445 date "2017-05-20" @default.
- W2891713445 modified "2023-10-05" @default.
- W2891713445 title "Do pancreas cancer stem cells play crucial role in survival outcome?" @default.
- W2891713445 doi "https://doi.org/10.1200/jco.2017.35.15_suppl.e15721" @default.
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