The common clinical manifestations arising from the tumor are rectal bleeding, change in bowel habits, rectal/ abdominal mass, anemia, weight loss, abdominal pain, pelvic
[symptoma.com]
Clinical Features The common clinical features of bowel cancer include change in bowel habit, rectal bleeding, weight loss*, abdominal pain, and iron-deficiency anaemia.
[teachmesurgery.com]
Rectal bleeding is a common manifestation. This presents as either drops of fresh blood or as blood streaked on the stools.
[symptoma.com]