Colonic vascular malformation

The etiology and pathogenesis of colonic vascular malformations remain unclear, and may be related to acquired vascular degeneration, congenital vascular dysplasia, and chronic mucosal ischemia. This disease can be summarized as having four major characteristics: variable disease duration, which can last up to more than ten years; recurrent bloody stools, generally with small amounts of bleeding; self-limiting nature; and absence of physical signs.