1963～1971年九年间,日本全国共做了186,137例尸检,其中恶性肿瘤患者共84,740例,男性51,995例,女性32,745例。在恶性肿瘤患者中,具有原发性多发恶性肿瘤者共1,512例,男性959例,女性553例。九年间多发性恶性肿瘤占恶性肿瘤的百分比,男性平均为1.8%(1.0～2.3%),女性平均1.7%(0.9～2.3%),男女合计平均为1.8%(1.0～2.3%),有逐年增高的趋势。1972年又剖检了337例多发性恶性肿瘤,因此1963～1972年的十年间合计共有1,849例。 During the nine years from 1963 to 1971, a total of 186,137 autopsy cases were performed in Japan, including 84,740 patients with malignant tumors, 51,995 men and 32,745 women. Among the patients with malignant tumors, there were 1,512 patients with multiple primary malignant tumors, 959 men and 553 women. In the nine years, the percentage of malignant tumors in multiple malignant tumors was 1.8% (1.0 to 2.3%) in men and 1.7% (0.9 to 2.3%) in women. The average of men and women was 1.8% (1.0 to 2.3%). Increased trend. In 1972, 337 cases of multiple malignancies were also examined. Therefore, there were a total of 1,849 cases during the decade from 1963 to 1972.