Albumin reflects the major protein in human plasma (40-60%). It is synthetized in the liver depending on protein uptake. Albumin in fecal samples refers to an inflammation reaction combined with intestinal bleeding. Elevated levels of albumin and hemoglobin in stool is found not only by colorectal carzinoma, but also with polyps and during chronic inflammatory diseases (Morbus Crohn oder Colitis Ulcerosa).