The commonest site of lymphoma in the gastrointestinal system is
Stomach is the commonest site of lymphoma in the gastrointestinal system is Stomach(55%). Helicobacter pylori infection is the causative agent commonly. Other sites are small bowel(30%), colon(10%), ileocaecal region (5%).Reference : page 856 SRB's manual of surgery 5th edition
Small bowel
Stomach
Large intestine
Oesophagus
Urology