Tatsuma Sakaguchi1, Sohei Satoi2, Daisuke Hashimoto1, Tomohisa Yamamoto1, So Yamaki1, Satoshi Hirooka1, Mitsuaki Ishida3, Tsukasa Ikeura4, Kentaro Inoue1, Makoto Naganuma4, Hideki Ishikawa5, Mitsugu Sekimoto1. 1. Department of Surgery, Kansai Medical University, 2-5-1 Shin-machi, Hirakata-city, Osaka, 573-1010, Japan. 2. Department of Surgery, Kansai Medical University, 2-5-1 Shin-machi, Hirakata-city, Osaka, 573-1010, Japan. satoi@hirakata.kmu.ac.jp. 3. Department of Pathology and Clinical Laboratory, Kansai Medical University, Osaka, Japan. 4. The Third Department of Internal Medicine, Kansai Medical University, Osaka, Japan. 5. Department of Molecular-Targeting Cancer Prevention, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Abstract
PURPOSE: Tumor budding is a histological characteristic defined as the presence of small clusters of cancer cells at the invasion front. Its significance in duodenal adenocarcinoma (DA) has not been fully described. METHODS: A single-center, retrospective study was conducted. Patients who underwent curative surgery for histologically diagnosed DA from January 2006 to December 2018 at Kansai Medical University Hospital were included. Tumor budding was counted per 0.785 mm2 and classified as low (0-4 buds), intermediate (5-9 buds), or high (≥ 10 buds). RESULTS: In total, 47 patients were included. The 5-year overall survival and relapse-free survival rates were 77% and 72%, respectively. High tumor budding was seen in 15 patients (32%). Excluding patients with superficial type (pT1) DA (n = 22), high tumor budding [hazard ratio (HR) 13.4, p = 0.028], regional lymph node metastasis (HR 19.9, p = 0.039), and adjuvant chemotherapy (HR 0.056, p = 0.036) were independent factors related to the overall survival in multivariate analyses. Distant metastases occurred significantly more often in patients who had high tumor budding than in others (p = 0.039). CONCLUSION: The data suggest that high tumor budding is a predictor of a poor prognosis in resected DA.
PURPOSE: Tumor budding is a histological characteristic defined as the presence of small clusters of cancer cells at the invasion front. Its significance in duodenal adenocarcinoma (DA) has not been fully described. METHODS: A single-center, retrospective study was conducted. Patients who underwent curative surgery for histologically diagnosed DA from January 2006 to December 2018 at Kansai Medical University Hospital were included. Tumor budding was counted per 0.785 mm2 and classified as low (0-4 buds), intermediate (5-9 buds), or high (≥ 10 buds). RESULTS: In total, 47 patients were included. The 5-year overall survival and relapse-free survival rates were 77% and 72%, respectively. High tumor budding was seen in 15 patients (32%). Excluding patients with superficial type (pT1) DA (n = 22), high tumor budding [hazard ratio (HR) 13.4, p = 0.028], regional lymph node metastasis (HR 19.9, p = 0.039), and adjuvant chemotherapy (HR 0.056, p = 0.036) were independent factors related to the overall survival in multivariate analyses. Distant metastases occurred significantly more often in patients who had high tumor budding than in others (p = 0.039). CONCLUSION: The data suggest that high tumor budding is a predictor of a poor prognosis in resected DA.
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