Mixed connective tissue disease (MCTD) has signs and symptoms of a combination of disorders mainly lupus, scleroderma, and polymyositis. Many people with this rare disease also have Sjogren's syndrome. For this reason, mixed connective tissue disease (MCTD) is sometimes known as an overlap disease.

The job of our lungs is to take oxygen from the environment and transfer it into the bloodstream. Lungs are located behind our ribcage in the chest on either side of the heart.

Renal artery stenosis is the contraction of one or more arteries that carry blood to your kidneys (renal arteries). Contraction of the arteries prevents normal amounts of oxygen-rich blood from reaching your kidneys.

Social anxiety disorder (SAD) or social phobia is an anxiety disorder characterized by extreme fear of getting involved in social situations. People with this disorder have trouble talking to people, meeting new people, and attending social gatherings.

Cryoglobulins are unusual proteins in the blood. These proteins might clump together at temperatures below 98.6 F (37 C) if you have cryoglobulinemia. These gelatinous protein clumps could impede your blood circulation,