Esophagus - Angiectasis

Angiectasis (vascular ectasia) is primarily a spontaneous, age-related lesion that can also be a response to chemical injury. Angiectasis consists of widely dilated vascular spaces, especially capillaries (or sinusoids) and venules, that are lined by unremarkable endothelial cells. The number of vessels is not altered, and there are no changes in the stroma of the organ. A distinction between angiectasis and hemangioma should be attempted, although the difference between angiectasis and hemangioma is sometimes not obvious. Hemangiomas tend to be well-circumscribed unencapsulated masses composed of tightly packed dilated vascular spaces. Each vascular space is enclosed and lined by a single layer of normal-appearing endothelial cells aligned on collagenous septa, which are usually thin, although some have broad collagenous stromata. Angiectasis does not usually present as a well-circumscribed mass, as the dilated vascular channels are often irregularly coursing through connective tissue.