Polymyositis. Polymyositis PM and necrotizing myopathy NM are two types of inflammatory myopathy characterized by characteristic features on a muscle biopsy. CK aldolase lactate dehydrogenase LD or LDH transaminases.
Polymyositis is a disease that causes muscles to become irritated and inflamed. It is a rare form of arthritis that affects muscles in the torso on both. It affects the muscles and connective tissues of the body and sometimes the joints too.
Polymyositis PM and necrotizing myopathy NM are two types of inflammatory myopathy characterized by characteristic features on a muscle biopsy.
Polymositis also known as idiopathic inflammatory myopathy is a type of inflammatory myopathy which refers to a group of muscle diseases characterized by chronic muscle inflammation and degenerative changes in the muscles leading to symmetric weakness and some degree of muscle wasting atrophy. Eventually people with polymyositis have trouble when rising from a sitting position climbing stairs lifting objects or reaching overhead. 1 The term myositis comes from myo which means muscle and itis that means inflammation. The term Polymyositis refers to a group of muscle diseases that in general refer to the inflammation of the muscles as well as the blood vessels and tissues that are associated with the muscles.