Established indication | Total |
Colorectal cancer (n=56) | |
Faecal occult blood test positive | 33 |
Bright red blood per rectum | 21 |
Microcytic anaemia | 15 |
Iron deficiency anaemia | 10 |
Change in bowel habit | 8 |
Abnormal barium enema | 2 |
Abnormal imaging other than barium enema | 2 |
Lung cancer (n=30) | |
Abnormal chest x-ray | 18 |
Abnormal chest CT scan | 8 |
Chronic cough | 3 |
Haemoptysis | 2 |
Weight loss >10 lbs | 2 |
↵* Some cases have more than one missed clue.