4382
The family of the propositus had a strong history of myotonic dystrophy , and there was an intrafamilial pathological expansion of the responsible CTG repeat between the mildly affected mother ( 160 repeats ; normal 27 repeats ) and her more severely affected son ( 650 repeats ) , and his sister ( 650 repeats ) .
 myotonic dystrophy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 myotonic dystrophy