50 y/o male with life-long mild lower extremity weakness; "I can't jump" ; CK=400, mild myopathic changes on EMG

DIAGNOSIS? (SCROLL DOWN)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

CENTRAL CORE MYOPATHY