Angiodysplasia

Angiodysplasia is a condition that affects the blood vessels in the digestive system, particularly in the colon. It involves the formation of fragile, abnormal blood vessels that can easily bleed. This bleeding can cause symptoms like blood in the stool or anemia due to chronic blood loss. The condition mainly affects older adults and can lead to significant health problems if the bleeding is severe or recurrent. Diagnosis often requires specialized tests to identify the source of bleeding. Treatment focuses on managing bleeding and preventing complications. Overall, it is a vascular disorder that impacts the gastrointestinal tract's ability to maintain normal blood flow.

Angiodysplasia is a vascular malformation characterized by dilated, tortuous, thin-walled blood vessels in the mucosa and submucosa of the gastrointestinal tract, most commonly the right colon. It results from chronic intermittent obstruction of submucosal veins leading to vascular dilation and fragility. The pathogenesis involves degenerative changes in the vessel walls, often associated with aging and increased wall tension. Clinically, it is a significant cause of lower gastrointestinal bleeding and iron deficiency anemia in elderly patients. The lesions are typically multiple and can cause occult or overt bleeding. Diagnosis is important due to the risk of recurrent hemorrhage and the need for targeted therapy. It is distinct from other vascular lesions such as hereditary hemorrhagic telangiectasia or Dieulafoy lesions.