Table 2 Incidence of metachronous cancer after head and neck cancer by age at diagnosis of index cancer
From: Impact of age at diagnosis of head and neck cancer on incidence of metachronous cancer
|  | Age ≥ 65 n = 983 | Age < 65 n = 970 | Total n = 1953 |
|---|---|---|---|
Esophageal cancer, n | 73 | 117 | 190 |
Lung cancer, n | 37 | 28 | 65 |
Other organs | |||
 Gastric cancer, n | 39 | 33 | 72 |
 Colorectal cancer, n | 17 | 18 | 35 |
 Liver cancer, n | 9 | 6 | 15 |
 Prostatic cancer, n | 7 | 4 | 11 |
 Thyroid cancer, n | 4 | 7 | 11 |
 Renal and ureter cancer, n | 8 | 2 | 10 |
 Breast cancer, n | 4 | 3 | 7 |
 Pancreatic cancer, n | 3 | 1 | 4 |
 Uterine cancer, n | 1 | 1 | 2 |
 Others, na | 5 | 6 | 11 |
 Total, n | 97 | 81 | 178 |