Having this condition can make it difficult to climb stairs, rise from a seated position, lift objects or reach overhead. Ninos, adolescentes y adultos, con polimiositis y dermatomiositis. Polymyositis polemyosytis is an uncommon inflammatory disease that causes muscle weakness affecting both sides of your body. Polimiositis genetic and rare diseases information. A myopathy is a muscle disease, and inflammation is a response to cell damage. Pm is characterized by chronic muscle inflammation and weakness. Miopatias inflamatorias revista medica clinica las condes elsevier. I iaeueoae e the inflammatory myopathies are a group of muscle diseases that involve inflammation of the muscles or associated tissues, such as the blood vessels that supply the muscles. The full text of this article is available in pdf format.