The causes of IM are not known. An autoimmune process is likely, as these conditions are often associated with other autoimmune diseases and because they respond to immunosuppressive medication.
Dermatomyositis, polymyositis, and inclusion-body myositis
Fever, Inflammatory myopathies, and vitamin A deficiency.
Muscle biopsy typically shows changes attributed to destruction by infiltrating lymphocytes (white blood cells).
Congenital myopathies are a group of myopathies, usually present from birth, that display structural changes in the skeletal muscles. The list of diseases defined as congenital myopathies varies.
Persons with mitochondrial myopathies are referred to a clinical geneticist for management and further evaluation, particularly in the absence of a confident clinical diagnosis
The diagnostic criteria for mitochondrial myopathies involve phenotypic evaluation (or evaluation of observable traits), followed by laboratory evaluation
As of 2004, there is no cure for the congenital myopathies. The purpose of treatment, which is largely supportive, is to help patients optimize function and to manage any medical complications associated with the disorder.
Symptoms of mitochondrial myopathies are largely variable from person to person, even within the same family, and are dependent on the amount and type of genetic mutations present
The diagnosis of mitochondrial myopathies is initially clinical, which means that it is based on the observable clinical manifestations that the patient shows versus results obtained from genetic analysis or laboratory tests
They are muscular dystrophies, myopathies, multiple sclerosis.
Defects can involve seizures, movement disorders , headaches , and cognitive (thought) disorders such as developmental delay or dementia (forgetfulness, senility). People with mitochondrial myopathies can also have hearing loss
Lawrence J. Kagen has written: 'Myositis & Myopathies'
In general diseases that attack the muscles are called myopathies. Muscular dystrophy would be one example.