In the recent years, colon and rectum have become the most common sites (apart from skin) where the population of the developed world, and also in Slovenia, develops one of the cancer diseases. In 2008, it was estimated that 1,235,108 people were diagnosed with colorectal cancer around the world (9.8% of all new cancer cases), and 609,051 died of the disease. It was estimated that in Europe in 2008, 229,229 men and 203,185 women were diagnosed with colorectal cancer, and 110,059 men and 102,160 died of it. In both genders, colorectal cancer represents one of the most common cancer diseases; in men, it was in third place with 12.8% (after prostate and lung cancers), and in women, it was in second place with 13.1%, right after breast cancer. ...