【摘要】 结合一例钚内污染人员所患肘部恶性纤维组织细胞瘤的辐射病因判断，提出非规范病例辐射致癌病因概率（ＰＣ）计算方法，作为示范。根据肿瘤的组织结构提出三种可能的靶细胞。通过现有剂量监测数据计算三种靶细胞的照射剂量。再利用间接导出的相应的致癌超额相对危险系数计算肿瘤来自所受照射的病因概率。其结果因所选用的靶细胞、危险系数和计算模型而有根大不同，最大相差４个量级。由于这个病例情况比较复杂，因此作者提出的计算步骤可供计算其它非规范病例ＰＣ参考。本文作者还结合国内、外钚内污染人员的医学观察经验对钚致癌的可能性进行讨论。更多还原

【Abstract】 A criterion for the compensation of patients with radiogenic cancer has been formulated for five specified cancers. A method of calculation of the probability of causation (PC) of non-specified cancers was applied to a case of malignant fibrous histiocytoma developed at the elbow of a plutonium contaminated worker. According to the histologic structure of the tumour, there were three possible target cells, and their doses were evaluated with the available data of urine plutonium. Then PC was calculated with excess relative risk coefficient indirectly deduced from related animal experiment.The result showed that the obtained PC varied greatly with the supposed target cells.If the target cells were periosteum cells,the PC might exceed 50 percent, but that might not be true, and the tumour might come from fibroblasts, and then PC might be less than 1 percent.更多还原