MSH: An inherited disorder of connective tissue with extensive degeneration and calcification of ELASTIC TISSUE primarily in the skin, eye, and vasculature. At least two forms exist, autosomal recessive and autosomal dominant. This disorder is caused by mutations of one of the ATP-BINDING CASSETTE TRANSPORTERS. Patients are predisposed to MYOCARDIAL INFARCTION and GASTROINTESTINAL HEMORRHAGE.,CSP: rare, progressive inherited disorder resulting from extensive basophilic degeneration of elastic tissue, usually presenting after puberty and involving the skin, eye, and cardiovascular system.,NCI: A rare, progressive, autosomal recessive inherited disorder caused by mutations in the ABCC6 gene. It is characterized by calcification and fragmentation of the elastic fibers of the skin, retina, and cardiovascular system. Signs and symptoms include skin plaques and bumps, thickened skin, retinal hemorrhage and obstruction of the blood vessels.