Examination of a group of usually asymptomatic individuals to detect those with a high probability of having a given disease.

Cancer cells which have broken away from the primary tumour and spread around the body to form secondary tumours. A secondary tumour is sometimes also called a metastasis (plural: metastases)

Inspection of the rectum and lower colon using a thin lighted tube called a sigmoidoscope. Samples of tissue or cells may be collected for examination under a microscope. Also called proctosigmoidoscopy.

The solid matter discharged in a bowel movement sometimes referred to as faeces or a motion.