There are four types of<unk>  myopathy Classical type (75% cases) The usual presentation is in infancy or childhood with hypotonia or proximal weakness. This weakness tends to affect the shoulder girdle and the inner thigh. The other main features are *Failure to thrive due to feeding difficulties * Axial muscle weakness, particularly affecting neck and trunk flexors * High pitched voice * Myopathic facial features A high arched or cleft palate may be present. Later developing features include a progressive scoliosis and respiratory impairment. Ophthalmoplegic form (5-10% cases) This typically presents with weakness of abduction and upward gaze. Ptosis may occur. There is also weakness of the proximal limb muscles. Progressive form with hand involvement (10% cases) The type presents with progressive hand weakness and hypermobility. Hip girdle weakness may be present and exercise induced myalgia is common. Scoliosis and respiratory problems are mild or absent. Antenatal form with arthrogryposis<unk> plex congenita (10% cases) This diagnosis may be suspected prenatally with reduced fetal movements and polyhydramnios. This typically presents with contractures at birth due to poor foetal movement. Other features include a long head, low set ears and a short neck. The respiratory muscles can be moderately to severely affected and problems with breathing are common.
Multi/minicore myopathy
Nemaline myopathy
Brody myopathy
Inflammatory myopathy
Metabolic myopathy
Polyneuropathy
Tick paralysis
Centronuclear myopathy