myotonic dystrophy Flashcards
1
Q
what
A
inherited myopathy
features developing 20-30yo
affects skeletal, cardiac + smooth muscle
2
Q
genetics
A
autosomal dominant
trinucleotide repeat disorder
3
Q
DM1
A
DMPK gene chr 19
distal weakness more prominent
4
Q
Dm2
A
repeat expansion ZNF9 gene chr 3
proximal weakness more prominant
5
Q
features
A
myotonic facies - long thin face frontal balding bilateral ptosis dysarthria slow relapsing grip