11. However, some centronuclear myopathies may present later in life. 12. Bethlem myopathy affects about 1 in 200, 000 people. 13. Blood tests are then conducted to determine the specific myopathy . 14. Acquired non-inflammatory myopathy is a different diagnosis than inflammatory myopathy. 15. Acquired non-inflammatory myopathy is a different diagnosis than inflammatory myopathy . 16. There are several other identified kinds of mutations that lead to Nemaline Myopathies . 17. Bulbar ( throat ) muscle weakness is a main feature of nemaline myopathy . 18. Mutations in nebulin cause some cases of the autosomal recessive disorder nemaline myopathy . 19. There is substantial overlap between the electrodiagnostic findings the various types of myopathy . 20. BSS often appears in individuals afflicted with mitochondrial myopathies .