Myotubular Myopathy is a genetic disorder that primarily affects muscle function. There are several ways to refer to this condition, including centronuclear myopathy, X-linked myotubular myopathy, and MTM. These terms all describe the same condition, with the severity and symptoms varying depending on the individual. Other potential symptoms associated with this disorder may include weakness in the limbs, difficulty breathing, and trouble with swallowing and/or speaking. Despite the variability in symptoms, however, the underlying cause of myotubular myopathy is always related to issues with muscle function caused by alterations to specific genes involved in muscle function and development.