X-linked myotubular myopathy (XLMTM) is a rare genetic neuromuscular disorder that is characterized by muscle weakness that is most typically severe but can range from mild to profound.  Common symptoms include mild to profound muscle weakness, diminished muscle tone (hypotonia or "floppiness"), feeding difficulties, and potentially severe breathing complications (respiratory distress).

read more about it <a href="https://rarediseases.org/rare-diseases/x-linked-myotubular-myopathy/" target="_blank" rel="noopener">here</a>