In another type of systemic scleroderma, known as diffuse cutaneous systemic scleroderma, the fibrosis affects large areas of skin, including the torso and the upper arms and legs, and often involves internal organs.n the third type of systemic scleroderma, called systemic sclerosis sine scleroderma (sine means without in Latin), fibrosis affects one or more internal organs but not the skin.
The UCL, or ulnar collateral. ligament, is located in. the middle thumb joint, and provides support to. the thumb during grip. and pinch. It is the most. common ligament injury.
In the hand, the ulnar and radial arteries interconnect to form two arches, from which branches to the digits emerge. 1  Radial artery â contributes mainly to supply of the thumb and the lateral side of the index finger. 2  Ulnar artery â contributes mainly to the supply of the rest of the digits, and the medial side of the index finger.