A patient with myotonic dystrophy diagnosed after experiencing sudden respiratory failure: a case report

JA Clinical Reports

Table 1 Summary of the clinical phenotypes and CTG repeat lengths in myotonic dystrophy type 1

Phenotype	Clinical signs	CTG repeat size	Age of onset	Average age of death
Phenotype	Clinical signs	CTG repeat size	(years)	(years)
Mild	Cataracts	50 ~ 150	20 ~ 70	60 ~
Mild	Mild myotonia	50 ~ 150	20 ~ 70	60 ~
Classical	Muscle weakness	100 ~ 1,000	10 ~ 30	48 ~ 60
	Myotonia
	Cataracts
	Cardiac arrhythmias
Congenital	Infantile hypotonia	> 1000	Birth to 10	45
	Respiratory failure
	Intellectual disability