Other conditions of the gastrointestinal tract dealt with by general surgery include disorders of the oesophagus, stomach, small bowel, large bowel and anus. These range from complex conditions such as ulceration or cancer (including adenocarcinoma, neuroendocrine and carcinoid tumours)  in the stomach, pancreas or bowel through to fairly minor conditions such as haemorrhoids. Many of the more major conditions such as bowel cancer will require surgery, or sometimes treatment with medication, chemotherapy or radiotherapy.