Mixed connective tissue disease has signs and symptoms of a combination of disorders — primarily lupus, scleroderma and polymyositis. For this reason, mixed connective tissue disease is sometimes referred to as an overlap disease.

PPA can obtain whole blood and plasma samples from these patients when they become available to our network of clinicians. Some disease types may have a long backorder depending on the frequency of the disease occurrence in the general population. All samples come from fully consented IRB approved collections.