PURPOSE: This study was designed to investigate whether characteristics, prognostic risk factors, and survival of colorectal cancer of Japanese-Americans in Hawaii are different from those of native Japanese in Japan....PURPOSE: This study was designed to investigate whether characteristics, prognostic risk factors, and survival of colorectal cancer of Japanese-Americans in Hawaii are different from those of native Japanese in Japan. METHODS: A retrospective review of patients with colorectal cancer surgically resected in single institutions in Hawaii and Japan from 1996 to 2002. RESULTS: A total of 410 Japanese-American patients (218 males; median age, 73 years) and 621 native Japanese patients (382 males; median age, 65 years) were included. There were significant differences in age (P < 0.001), age distribution (P < 0.001), gender (P= 0.008), preoperative carcinoembryonic antigen (P < 0.001), and anatomic site distribution (P < 0.001). The tumor characteristics of Japanese- American patients were close to the general American population compared with the Surveillance, Epidemiology, and End Results data. There were no differences in tumor size, histologic grade, each of T, N, M status and TNM stage between the two groups. The overall five-year survival rates (Japanese-Americans, 75.5 percent; native Japanese, 76.2 percent; P = 0.55) and survival rates in each of four stratified stages were similar. Risk factors associated with survival were not different, except for carcinoembryonic antigen (P = 0.036). CONCLUSIONS: In patients with colorectal cancer in Japanese-Americans in Hawaii, some of tumor characteristics have changed from those of native Japanese in Japan. However, there are no remarkable differences in prognostic factors and survival between the two groups. The present study suggests that certain changes of colorectal cancer characteristics that were seen in Japanese-American may occur in native Japanese in Japan in the near future, although the survival-outcome of colorectal cancer may remain the same.展开更多
PURPOSE: Carcinomatosis from colon and rectal cancer has always been regarded as a lethal condition. Recently, numerous reports suggest that long-term survival is possible in selected patients if a definitive manageme...PURPOSE: Carcinomatosis from colon and rectal cancer has always been regarded as a lethal condition. Recently, numerous reports suggest that long-term survival is possible in selected patients if a definitive management strategy is used. An important task involves the clear description of the clinical features that influence prognosis in these patients. METHODS: From June 1981 to November 2004, 156 patients with peritoneal carcinomatosis secondary to colorectal cancer underwent cytoreductive surgery with perioperative intraperitoneal chemotherapy. Among these patients, 11 had rectal cancer with carcinomatosis and are the focus of the present study. The survival of patients with peritoneal carcinomatosis of rectal cancer origin was compared with patients with colon cancer. In the data analysis, patients were classified by completeness of cytoreduction score. RESULTS: The mean follow-up for 11 patients with rectal cancer was 15.7 (range, 3-51) months. At the end of the cytoreductive surgery, the cytoreduction was complete in six patients, nearly complete in two patients, and there was gross disease in three patients. The median survival of the six rectal cancer patients with complete cytoreduction was 17 (range, 12-29) months and 35 (range, 3-241) months for 64 colon cancer patients with complete cytoreduction (P = 0.126). The five-year survival for patients with rectal cancer with complete cytoreduction was 0 percent and for patients with colon cancer was 33 percent. CONCLUSIONS: Patients with peritoneal carcinomatosis secondary to rectal cancer treated by cytoreductive surgery combined with intraperitoneal chemotherapy have a poor prognosis. Some improvement in these poor results may occur if resection of a rectal cancer with carcinomatosis is delayed until definitive treatment of the primary cancer plus the carcinomatosis is possible.展开更多
文摘PURPOSE: This study was designed to investigate whether characteristics, prognostic risk factors, and survival of colorectal cancer of Japanese-Americans in Hawaii are different from those of native Japanese in Japan. METHODS: A retrospective review of patients with colorectal cancer surgically resected in single institutions in Hawaii and Japan from 1996 to 2002. RESULTS: A total of 410 Japanese-American patients (218 males; median age, 73 years) and 621 native Japanese patients (382 males; median age, 65 years) were included. There were significant differences in age (P < 0.001), age distribution (P < 0.001), gender (P= 0.008), preoperative carcinoembryonic antigen (P < 0.001), and anatomic site distribution (P < 0.001). The tumor characteristics of Japanese- American patients were close to the general American population compared with the Surveillance, Epidemiology, and End Results data. There were no differences in tumor size, histologic grade, each of T, N, M status and TNM stage between the two groups. The overall five-year survival rates (Japanese-Americans, 75.5 percent; native Japanese, 76.2 percent; P = 0.55) and survival rates in each of four stratified stages were similar. Risk factors associated with survival were not different, except for carcinoembryonic antigen (P = 0.036). CONCLUSIONS: In patients with colorectal cancer in Japanese-Americans in Hawaii, some of tumor characteristics have changed from those of native Japanese in Japan. However, there are no remarkable differences in prognostic factors and survival between the two groups. The present study suggests that certain changes of colorectal cancer characteristics that were seen in Japanese-American may occur in native Japanese in Japan in the near future, although the survival-outcome of colorectal cancer may remain the same.
文摘PURPOSE: Carcinomatosis from colon and rectal cancer has always been regarded as a lethal condition. Recently, numerous reports suggest that long-term survival is possible in selected patients if a definitive management strategy is used. An important task involves the clear description of the clinical features that influence prognosis in these patients. METHODS: From June 1981 to November 2004, 156 patients with peritoneal carcinomatosis secondary to colorectal cancer underwent cytoreductive surgery with perioperative intraperitoneal chemotherapy. Among these patients, 11 had rectal cancer with carcinomatosis and are the focus of the present study. The survival of patients with peritoneal carcinomatosis of rectal cancer origin was compared with patients with colon cancer. In the data analysis, patients were classified by completeness of cytoreduction score. RESULTS: The mean follow-up for 11 patients with rectal cancer was 15.7 (range, 3-51) months. At the end of the cytoreductive surgery, the cytoreduction was complete in six patients, nearly complete in two patients, and there was gross disease in three patients. The median survival of the six rectal cancer patients with complete cytoreduction was 17 (range, 12-29) months and 35 (range, 3-241) months for 64 colon cancer patients with complete cytoreduction (P = 0.126). The five-year survival for patients with rectal cancer with complete cytoreduction was 0 percent and for patients with colon cancer was 33 percent. CONCLUSIONS: Patients with peritoneal carcinomatosis secondary to rectal cancer treated by cytoreductive surgery combined with intraperitoneal chemotherapy have a poor prognosis. Some improvement in these poor results may occur if resection of a rectal cancer with carcinomatosis is delayed until definitive treatment of the primary cancer plus the carcinomatosis is possible.
