Evaluation of extra capsular lymph node involvement in patients with extra-hepatic bile duct cancer
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概要
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Background: Lymph node metastasis is one of the most important prognostic factors for extra-hepatic bile duct carcinoma (ExHBDC). Extra capsular lymph node involvement (ExCLNI) is the extension of cancer cells through the nodal capsule into the perinodal fatty tissue. The prognostic impact of ExCLNI has been shown to be significant mainly in head and neck malignancies. Recently, the prognostic impacts of ExCLNI have evaluated in gastrointestinal malignancies. However no data is available regarding the incidence and prognostic significance of extra-capsular lymph node involvement (ExCLNI) in resectable ExHBDCs. The aim of the present study is first to evaluate the incidence of ExCLNI in surgically-treated ExHBDCs and second, to determine the prognostic impact of ExCLNI in patients with surgically-treated ExHBDCs. Methods: A total of 228 patients (110 cases of hilar cholangiocarcinoma and 118 cases of distal cholangiocarcinoma) with surgically-treated ExHBDCs were included in this retrospective study. ExCLNI was defined as the extension of cancer cells through the nodal capsule into the perinodal fatty tissue. The existence of ExCLNI and its prognostic value were analyzed as a subgroup of lymph node metastasis. Results: ExCLNI was detected in only 22% of patients with lymph node metastasis of surgically-treated ExHBDC. The presence of ExCLNI correlated with distal cholangiocarcinoma (p = 0.002). On univariate analysis for survival, perineural invasion, vascular invasion, histological grade, and lymph node metastasis were statistically significant factors. On multivariate analysis, only lymph node metastasis was identified as a significant independent prognostic factor in patients with resectable ExHBDC. Subgroups of lymph node metastasis including the presence of ExCLNI, location of lymph node metastasis, and the number of lymph node metastasis had no statistically significant impact on survival. Conclusion: ExCLNI was present in only 22% of the LNM (7% of overall patients) in patients with surgical treated ExHBDCs. And ExCLNI would have no impact on the survival of patients with surgically-treated ExHBDCs.
- 2012-06-08
著者
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Hirano Satoshi
北海道大学 医学研究科腫瘍外科学分野
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Sugiura Hiroshi
Department Of Surgical Oncology Division Of Cancer Medicine Hokkaido University Graduate School Of M
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HIRANO SATOSHI
Department of Surgical Oncology, Hokkaido University Graduate School of Medicine
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Noji Takehiro
北海道大学 医研究腫瘍外科学
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Ambo Yoshiyasu
Department Of Surgical Oncology Division Of Cancer Medicine Hokkaido University Graduate School Of M
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Shirato Hiroki
Keiyukai Sapporo Hospital Sapporo Jpn
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Kashimura Nobuichi
Department Of Surgery Teine-keijinkai Hospital
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Haba Shin
Department Of Gastroenterology Hokkaido University Graduate School Of Medicine
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Hirano Satoshi
Surgical Oncology Hokkaido University Graduate School Of Medicine
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