dermatomyositis Flashcards
(4 cards)
1
Q
what is dermatomyositis
A
inflammatory disorder causing symmetrical, proximal muscle weakness and characteristic skin lesions
2
Q
skin features in dermatomyositis
A
photosensitive
macular rash over back and shoulders
heliotrope rash in periorbital region
gottron’s papules- over extensor surface of fingers
extremely dry and scaly hands with linear cracks
nail fold capillary dilatation
3
Q
other features of dermatomyositis (polymyositis is variant without skin manifestations)
A
proximal muscle weakness +/- tenderness
raynauds
respiratory muscle weakness
interstitial lung disease
dysphagia, dysphonia
4
Q
investigations for dermatomyositis
A
ANA positive
30%: aminoacyl-tRNA synthetases, anti-Jo-1
