악성종양의 (惡性腫瘍) 통계적 의의

Cancer is now the leading cause of death in most countries, and there appears to be an actual increase in the prevalence of cancer in recent vears. Recent statistics of the United States of America and 3Vestern Europe indicated that the cancer is the second most frcquent cause of death being only preceded by cardiovascular diseases. During the last four dcades our kiiosvledge of the causation oi turriouvs has advanced rapidly. The following studies of tavo sorts have contribu.ed to this advance; a) statistieaJ studies of occupationa1, social and racial f-ctors in the causation of human neop!asms, and b; studics in the experimental production of turr.ours in animals by rneans of chemical and other agents. This statistical studies was done on 4, 905 cases of malignancies, diagnosed pathologically and clini- cally among 76,763 patients admitted to Severance Hospital during the last 10 years from 1960 tn 1969, and the following results vere obtained. L. Annual incidence of malignancies showed gradual increase in total nurnber, however there is no significant variation in ratio to the number of total in-patients during the years of observation, mean being 6. 4%. 2. Ma!e to fem!e ratio of all malignancies avas about 1: 1. 3, Over the hzlf (56,7%) of a!I malignancies ivas in 5th and 6th decades, the peak age being in 6th decade in male (33, 5%) and 5th decade in female (28. 9%). 4. The relative frequency of all malignancies by system was in order of cancer of digestive system (43. 1%), genitourinary system and breast(32. 2%), respiratory system (9. 0%), hematopoietic system (8. 1%), musculoskeletal system and skin (3. 4%), endocrine system (1.3%) znd others (2. 9%). 5. The over all frequency of maIignancies by organ ivas in order of cancer of stomach (24. 1%), uterus (19, 9%), liver (10. 8%), lung(7. 4%), leukemia(4. 8%). In male the order of frequency was cancer of stomach (34. 2%), liver (17. 9%) 3, Iung (11. 5%), leukemia (5. 3%), lymphoma (4. 4%), while ir; female it was cancer of uterus (40.2%), stomach (13. 8%), breast (8. 2%), ovary (5. 2%), leukemia (4. 4%). 6. The peak age of relatively frequent ma]ignancies was as follows: the peak age of the cancer of the stomach, liver, lymphoma and lung was in the 6th decade; that of uterus, breast, and coIo-rectal