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2022, Volume 38, Number 3, Page(s) 284-291     
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DOI: 10.5146/tjpath.2022.01583
The Site of Lymph Node Metastasis: A Significant Prognostic Factor in Pancreatic Ductal Adenocarcinoma
Anil AYSAL1, Cihan AGALAR2, Sumru CAGAPTAY1, Turugsan SAFAK2, Tufan EGELI2, Mucahit OZBILGIN2, Tugba UNEK3, Tarkan UNEK3, Ozgul SAGOL1
1Department of Pathology, Dokuz Eylul University, Faculty of Medicine, IZMIR, TURKEY
2Department of General Surgery, Dokuz Eylul University, Faculty of Medicine, IZMIR, TURKEY
3Department of Medical Oncology, Dokuz Eylul University, Faculty of Medicine, IZMIR, TURKEY
Keywords: Pancreatic ductal adenocarcinoma, Regional lymph node site, Metastasis

Objective: While the presence and number of metastatic lymph nodes (LNs) are important prognostic factors for pancreatic ductal adenocarcinoma (PDAC), there is no recommendation to specify metastatic regional LN localization in the current staging system. The aim of this study was to evaluate the prognostic effect of regional metastatic LN localizations in PDAC.

Material and Method:Metastatic sites of 101 consecutive PDAC patients who underwent pancreaticoduodenectomy were classified as peripancreatic, perigastric, hepatica communis, hepatoduodenal, and superior mesenteric artery. The frequency of metastasis in each region and the association between the presence of metastasis in each site and overall and disease-free survival were statistically analyzed.

Results: Eighty cases (79.2%) had peripancreatic, 7 (6.9%) had perigastric, 6 (5.9%) had hepatica communis, 7 (6.9%) had hepatoduodenal, and 4 (4%) had superior mesenteric artery LN metastasis. The overall and disease-free survival values were significantly shorter in patients with hepatoduodenal LN metastasis (log rank; p= 0.001, p=0.017, respectively). The presence of metastatic superior mesenteric artery LN was significantly associated with shorter disease-free survival in univariate analysis (p=0.017). Hepatoduodenal LN metastasis was an independent predictor of mortality (p=0.005) in multivariate analysis.

Conclusion: The presence of hepatoduodenal LN metastasis is an independent poor prognostic factor for mortality. The presence of metastatic LN in the superior mesenteric artery region was significantly associated with shorter disease-free survival time, although not an independent predictor. We conclude that the metastatic regional LN sites, especially the hepatoduodenal region, have an impact on the prognosis, and should be included in synoptic pathology reports.

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