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. MCTD combines features of scleroderma, myositis, systemic lupus erythematosus, and rheumatoid arthritis .About 80% of people who have this disease are women. The cause is unknown. In some patients, the disorder evolves into classic systemic sclerosis or SLE.
In mixed connective tissue disease, the symptoms of the separate diseases usually don't appear all at once. Instead, they tend to occur in sequence over a number of years, which can make diagnosis more complicated. Early signs and symptoms often involve the hands. Fingers might swell like sausages, and the fingertips become white and numb. In later stages, some organs — such as the lungs, heart and kidneys — may be affected.
There's no cure for mixed connective tissue disease. The signs and symptoms are usually treated with certain medications, such as prednisone.Early indications of mixed connective tissue disease can include: General feeling of being unwell, Cold and numb fingers or toes (Raynaud's phenomenon), Swollen fingers or hands, Muscle and joint pain.