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10.1245/s10434-006-9071-3
Annals of Surgical Oncology 14:1336-1346 (2007)
© 2007 Society of Surgical Oncology
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Original Article

Long-Term Characteristics of 5-Year Survivors After Liver Resection for Colorectal Metastases

Kuniya Tanaka, MD, PhD, Hiroshi Shimada, MD, PhD, Michio Ueda, MD, Kenichi Matsuo, MD, Itaru Endo, MD, PhD and Shinji Togo, MD, PhD

Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan

Correspondence: Address correspondence and reprint requests to: Kuniya Tanaka, MD, PhD; E-mail: ktrj112{at}urahp.yokohama-cu.ac.jp

Background: We investigated factors affecting 5-year survival in patients undergoing hepatic resection for colorectal cancer metastases, including events long after initial hepatectomy. Although retrospective studies have demonstrated survival benefit of hepatectomy for metastatic colorectal cancer, few have included sufficient 5-year survivors to identify survival-related factors throughout the clinical course.

Methods: We divided 156 patients with hepatectomy for colorectal cancer metastases into 5-year survivors (n = 64) and patients dying before 5 years after hepatectomy (n = 92). Clinicopathologic data were compared retrospectively with respect to long-term outcome.

Results: By multivariate analysis, large liver tumors (adjusted relative risk, 2.029; P = .011), short tumor doubling time (1.809; P = .026), and origin from poorly differentiated primary adenocarcinoma (12.632; P = .001) compromised survival, whereas initial treatment-related variables did not. Although no difference was seen in initial treatment-related variables between 5-year survivors with recurrence after hepatectomy and patients dying before 5 years, repeat surgery was used more frequently in survivors (P < .001), typically with adjuvant chemotherapy.

Conclusions: Reoperations for each recurrence of metastases, followed by additional chemotherapy, frequently resulted in long survival.

Key Words: Colorectal cancer • Liver metastasis • Hepatectomy • Long survival




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