Clinical Example: CREST syndrome with scleroderma, telangiectasias and subcutaneous calcification

Scleroderma is a systemic disease, but commonly affects the hands in several ways. Finger stiffness is typical. Scleroderma may be associated with other syndromes, and a common combination is Calcinosis, Raynaud's, Esophageal motility disorders, Scleroderma and Telangiectasias - CREST syndrome. In this syndrome, the hands are affected by calcinosis, Raynaud's and scleroderma. Skin ulcerations may arise from Raynaud's related peripheral vascular insufficiency (fingertips), from scleroderma related skin tightness (extensor surfaces of the proximal interphalangeal or metacarpophalangeal joints), or from extrusion of subcutaneous calcium formations (any location). 

 
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Tightness of skin is apparent over the dorsal fingers, with loss of extensor skin creases.
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The right index and middle fingertips are large, hard and tender.
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Xrays show extensive soft tissue calcifications of the distal pulp of these fingers.
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Soft tissue calcifications are typically diffuse, and can not be simply "shelled out". Thorough excision may lead to extensive skin loss, and partial removal (limited incision and drainage) may be a reasonable compromise approach in selected cases.
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Healing ulcerations on the left index and middle fingertips, where calcium deposits have spontaneously drained in the past.
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Subcutaneous calcification of the extensor surface of the elbow is common, and a common site for spontaneous drainage and infection. 
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Isolated involvement around the flexor carpi ulnaris at the level of the wrist.
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