Answer
1) Raynaud phenomena is recurrent vasospasm of fingers and toe in response to stress or cold exposure
2) Mixed connective tissue disease, SLE, Polymyositis/dermatomyositis
3) Raynaud's disease is when the phenomena occurs without associated connective tissue disease
4) Clinical variant of limited scleroderma characterized by calcinosis, Raynaud phenomenon, esophageal dysmotility, Sclerodactyly and telengiectases. It is a milder form of widespread scleroderma but with increased risk of developing pulmonary hypertension
5) Raynaud phenomena is a reversible condition that is usually occurs in three phases namely vasoconstriction, cyanosis and rapid blood re flow. Rarely it may cause ischemia.