Angiodysplasia of the caecum. Endoscopic view of angiodysplasia affecting a patient's caecum. The caecum is the pouch that connects the ileum (small intestine) to the colon of the large intestine. Angiodysplasia is a condition where blood vessels in the wall of the intestines become deformed, forming lesions (red). This results in blood loss, which can lead to anaemia and may require transfusions. If the lesions are localised in one area, removal of that part of the intestines may treat the condition. Hormone therapy with oestrogens can stop bleeding by inducing clotting, but has many side effects.