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Prognostic Value of Mucinous Histology Depends on Microsatellite Instability Status in Patients with Stage III Colon Cancer Treated with Adjuvant FOLFOX Chemotherapy: A Retrospective Cohort Study

 Se Hyun Kim ; Sang Joon Shin ; Joong Bae Ahn ; Jae Kyung Roh ; Hyun Chul Chung ; Nam Kyu Kim ; Byung So Min ; Hyuk Hur ; Dae Ryong Kang ; Tae Il Kim ; Hyunki Kim ; Kang Young Lee 
 Annals of Surgical Oncology, Vol.20(11) : 3407~3413, 2013 
Journal Title
 Annals of Surgical Oncology 
Issue Date
BACKGROUND: The close association between mucinous histology and microsatellite instability (MSI) may have hindered the evaluation of prognostic significance of mucinous histology. The aim of this retrospective study was to investigate whether mucinous histology was associated with a worse prognosis, independent of MSI status, compared to nonmucinous histology in patients with stage III colon cancer. METHODS: This study enrolled 394 consecutive patients with stage III colorectal cancer treated with adjuvant FOLFOX after curative resection (R0). Clinicopathological information was retrospectively reviewed. Tumors were analyzed for MSI by polymerase chain reaction to determine MSI status. Kaplan-Meier method, log-rank test, and Cox proportional hazard regression models were used. RESULTS: The estimated rate of 3-year disease-free survival (DFS) in patients with nonmucinous adenocarcinoma (NMA 79.2 %) was significantly greater than that in patients with mucinous adenocarcinoma (MA) and adenocarcinoma with mucinous component (MC) (56.9 %; log-rank, P = 0.002). In univariate analysis, histology (NMA vs. MA/MC), American Joint Committee on Cancer stage (IIIA, IIIB, and IIIC), and lymphovascular invasion (present vs. absent) were significantly associated with DFS. In multivariate analysis, mucinous histology (MA/MC) was associated with decreased DFS in all patients (hazard ratio 1.82, 95 % confidence interval 1.03-3.23, P = 0.0403). In patients with MA/MC, no difference in DFS was observed between MSI and microsatellite stability (log-rank, P = 0.732). CONCLUSIONS: Mucinous histology is an independent poor prognostic factor for DFS in patients with stage III colon cancer after adjuvant FOLFOX chemotherapy.
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Preventive Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Pathology
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Surgery
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