This study described methods to predict human health risk associated with exposure to environmental carciongens using animal bioassay data. Also, biological assumption for various dose-response models were reviewed. To illustrate the process of risk estimate using relevant dose-response models such as Log-normal, Mantel-Bryan, Weibull and Multistage model, we used four animal carcinogenesis bioassy data of chloroform and chloroform concentrations of tap water measured in large cities of korea from 1987 to 1995. As a result, in the case of using average concentration in exposure data and 95 % upper boud unit risk of Multistage model, excess cancer risk(RISK I) was about 1.9 x 10-6, in the case of using probability distribution of cumulative exposure data and unit risks, those risks(RISK II) which were simulated by Monte-Carlo analysis were about 2.4 x 10(-6) and 7.9 x 10(-5) at 50 and 95 percentile, respectively. Therefore risk estimated by Monte-Carlo analysis using probability distribution of input variables may be more conservative.
Animals ; Biological Assay ; Carcinogenesis ; Carcinogens, Environmental* ; Chloroform ; Humans ; Korea ; Water

Perihilar cholangiocarcinoma, a rare and aggressive tumor, can develop in the bile ducts at the junction of the right and left hepatic ducts. Successful treatment with of surgical excision and/or transplantation has significantly improved the management of the disease, leading to increased survival rates and better quality of life for patients. Nonetheless, challenges persist, including limited therapy options for advanced-stage disease, potential risks, and a shortage of donor organs. For early-stage disease, surgical resection, usually right hepatectomy, is the preferred treatment, while transplantation is indicated for non-resectable cases. Liver transplantation offers prolonged survival for certain individuals; however, it requires lifelong immunosuppression and carries the risk of recurrence. The choice between resection and transplantation depends on various factors, including disease stage, patient health, and the availability of a donor organ. For patients diagnosed with perihilar cholangiocarcinoma, implementing an interdisciplinary approach is crucial for optimizing therapeutic efficacy.

Perihilar cholangiocarcinoma, a rare and aggressive tumor, can develop in the bile ducts at the junction of the right and left hepatic ducts. Successful treatment with of surgical excision and/or transplantation has significantly improved the management of the disease, leading to increased survival rates and better quality of life for patients. Nonetheless, challenges persist, including limited therapy options for advanced-stage disease, potential risks, and a shortage of donor organs. For early-stage disease, surgical resection, usually right hepatectomy, is the preferred treatment, while transplantation is indicated for non-resectable cases. Liver transplantation offers prolonged survival for certain individuals; however, it requires lifelong immunosuppression and carries the risk of recurrence. The choice between resection and transplantation depends on various factors, including disease stage, patient health, and the availability of a donor organ. For patients diagnosed with perihilar cholangiocarcinoma, implementing an interdisciplinary approach is crucial for optimizing therapeutic efficacy.

Perihilar cholangiocarcinoma, a rare and aggressive tumor, can develop in the bile ducts at the junction of the right and left hepatic ducts. Successful treatment with of surgical excision and/or transplantation has significantly improved the management of the disease, leading to increased survival rates and better quality of life for patients. Nonetheless, challenges persist, including limited therapy options for advanced-stage disease, potential risks, and a shortage of donor organs. For early-stage disease, surgical resection, usually right hepatectomy, is the preferred treatment, while transplantation is indicated for non-resectable cases. Liver transplantation offers prolonged survival for certain individuals; however, it requires lifelong immunosuppression and carries the risk of recurrence. The choice between resection and transplantation depends on various factors, including disease stage, patient health, and the availability of a donor organ. For patients diagnosed with perihilar cholangiocarcinoma, implementing an interdisciplinary approach is crucial for optimizing therapeutic efficacy.

Perihilar cholangiocarcinoma, a rare and aggressive tumor, can develop in the bile ducts at the junction of the right and left hepatic ducts. Successful treatment with of surgical excision and/or transplantation has significantly improved the management of the disease, leading to increased survival rates and better quality of life for patients. Nonetheless, challenges persist, including limited therapy options for advanced-stage disease, potential risks, and a shortage of donor organs. For early-stage disease, surgical resection, usually right hepatectomy, is the preferred treatment, while transplantation is indicated for non-resectable cases. Liver transplantation offers prolonged survival for certain individuals; however, it requires lifelong immunosuppression and carries the risk of recurrence. The choice between resection and transplantation depends on various factors, including disease stage, patient health, and the availability of a donor organ. For patients diagnosed with perihilar cholangiocarcinoma, implementing an interdisciplinary approach is crucial for optimizing therapeutic efficacy.

Perihilar cholangiocarcinoma, a rare and aggressive tumor, can develop in the bile ducts at the junction of the right and left hepatic ducts. Successful treatment with of surgical excision and/or transplantation has significantly improved the management of the disease, leading to increased survival rates and better quality of life for patients. Nonetheless, challenges persist, including limited therapy options for advanced-stage disease, potential risks, and a shortage of donor organs. For early-stage disease, surgical resection, usually right hepatectomy, is the preferred treatment, while transplantation is indicated for non-resectable cases. Liver transplantation offers prolonged survival for certain individuals; however, it requires lifelong immunosuppression and carries the risk of recurrence. The choice between resection and transplantation depends on various factors, including disease stage, patient health, and the availability of a donor organ. For patients diagnosed with perihilar cholangiocarcinoma, implementing an interdisciplinary approach is crucial for optimizing therapeutic efficacy.