A 27-year-old man presents with right lower abdominal pain and intermittent passage of stools mixed with altered blood for 2 months. The abdominal pain was colicky in nature and lasted for a variable duration each time, with spontaneous resolution. His bowel habits were otherwise unaltered. He also lost 3 kg of weight during the same time period, but was not anorectic. His surgical history is unremarkable, while his medical history is significant for an episode of infectious mononucleosis 2 years ago. His family history is only significant for endometrial cancer in his mother which was diagnosed when she was 40 years of age. He is not on any medications. He only drinks socially and denies smoking. A full blood count is performed, and found to be within normal parameters.