Ehlers-Danlos syndrome is a group of inherited disorders that affect connective tissue, the tissue that binds and supports the body's muscles, ligaments, organs, and skin. The classical type is characterized by highly elastic, soft, and doughy skin; unusual scarring; and loose joints. This type of Ehlers-Danlos syndrome combines the types formerly called I and II. Ehlers-Danlos syndrome, classical type is a subtype of Ehlers-Danlos syndrome. People with the disorder have smooth, velvety skin that is stretchy, fragile, and easily bruised. Wounds often split open with little bleeding, heal slowly, and leave characteristic thin, wide scars ("cigarette paper" scars). People with this condition also have loose joints with an unusually large range of movement (hypermobility). As a result, joints are prone to dislocation, sprains, and early-onset arthritis. Noncancerous fibrous growths on pressure points (such as elbows) and fatty growths on the forearms and shins are also common. Other signs of the disorder include weak muscle tone in infants due to hypermobility, which can make them seem "floppy" and delay the development of motor skills such as sitting, standing, and walking. As many as half of people with classical Ehlers-Danlos syndrome have a condition called mitral valve prolapse, which affects blood flow between the chambers of the heart.