Although all forms of<unk>  are considered rare, the most commonly known form of<unk>  is Myotubular Myopathy (MTM). (The terms<unk> " and "myotubular myopathy" are sometimes equated.) Literally, a myopathy is a disease of the muscle tissue itself. Myo derives from the word muscle and pathos means disease. There are dozens of different myopathies, and myopathies are not the only conditions that can cause muscle weakness. Other diseases can cause weakness such as medical conditions affecting sites outside of the muscle itself, including problems in the brain (such as stroke, cerebral palsy, multiple sclerosis), or problems in the spinal cord and/or nerve (such as polio and spinal muscular atrophy).
Centronuclear myopathy
Nemaline myopathy
Brody myopathy
Hereditary inclusion body myopathy
Inflammatory myopathy
Muscular dystrophy
Metabolic myopathy
Autophagic vacuolar myopathy