This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Sneddon syndrome is a rare, progressive condition that affects blood vessels. It is primarily characterized by livedo reticularis (net-like patterns of discoloration on the skin) and neurological abnormalities. Symptoms may include transient ischemic attacks (mini-strokes) and strokes; headache; dizziness; high blood pressure; and heart disease. Reduced blood flow to the brain may cause reduced intellectual ability, memory loss, personality changes, and/or other neurological symptoms. The cause of Sneddon syndrome is often unknown, but it is sometimes associated with an autoimmune disease. Most cases are sporadic but some familial cases with autosomal dominant inheritance have been reported. Some researchers separate Sneddon syndrome into two different types depending on whether an underlying cause has been identified (primary versus idiopathic), while others suggest a classification based on whether certain symptoms of autoimmune disease are present or not (aPL-positive versus aPL negative). Treatment usually involves anticoagulation (blood-thinning) with warfarin, and/or the use of other medications.
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