說的應該是肺癌是所有癌症中的頭號殺手

CANADA CANCER RANK BY TYPE
AGE-STANDARDIZED DEATH RATE
PER 100,000 POPULATION GOOD               POOR
Rate World Rank 1 Lung Cancers 33.68 11 2 Breast Cancer 20.20 46 3 Colon-Rectum Cancers 14.79 37 4 Lymphomas 8.47 13 5 Pancreas Cancer 6.64 43 6 Prostate Cancer 6.62 91 7 Leukemia 4.83 43 8 Stomach Cancer 3.94 154 9 Oesophagus Cancer 3.18 84	Rate World Rank 10 Bladder Cancer 3.10 70 11 Ovary Cancer 3.06 53 12 Liver Cancer 2.90 167 13 Other Neoplasms 2.41 116 14 Oral Cancer 2.34 117 15 Skin Cancers 2.19 44 16 Cervical Cancer 1.26 165 17 Uterin Cancer 1.20 85