Associated conditions

Dermatomyositis may cause other conditions or put you at higher risk of developing them, including:

• Raynaud's phenomenon. This condition causes your fingers, toes, cheeks, nose and ears to turn pale when exposed to cold temperatures.
• Other connective tissue diseases. Other conditions, such as lupus, rheumatoid arthritis, scleroderma and Sjogren's syndrome, can occur with dermatomyositis (overlap syndromes).
• Cardiovascular disease. Dermatomyositis can cause heart muscle inflammation (myocarditis). In a small number of people who have dermatomyositis, congestive heart failure and heart arrhythmias develop.
• Lung disease. Interstitial lung disease can occur with dermatomyositis. Interstitial lung disease refers to a group of disorders that cause scarring (fibrosis) of lung tissue, making the lungs stiff and inelastic. Signs and symptoms include a dry cough and shortness of breath.
• Cancer. Dermatomyositis in adults has been linked to an increased likelihood of developing cancer, particularly of the cervix, lungs, pancreas, breasts, ovaries and gastrointestinal tract. Risk of cancer increases with age, although it appears to level off three years or so after a diagnosis of dermatomyositis. Dermatomyositis can also develop after you receive a diagnosis of cancer.