Total 24 clinical symptoms reported for Severe X-linked myotubular myopathy  Very Frequent (2)Occasional (5)Frequent (17)

Low APGAR score	This section is currently in development.	Very frequent
Type 1 fibers relatively smaller than type 2 fibers	The presence of abnormal muscle fiber size such that type 1 fibers are smaller than type 2 fibers.	Very frequent