Dermatomyositis Flashcards

1
Q

Features

A

proximal muscle weakness and characteristic skin lesions

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2
Q

Skin changes

A

photosensitive
macular rash over back and shoulder
heliotrope rash in the periorbital region
Gottron’s papules - roughened red papules over extensor surfaces of fingers

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3
Q

Is dermatmyositis senstivie to the sun?

A

Yes

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4
Q

Diagnostic investigation

A

Muscle biopsy

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5
Q

Other investigation findings

A

Raised CK
ANA positive
anti-synthetase antibodies
- Jo-1, SRP, anti-Mi2

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6
Q

What antibodies would be positive

A

Anti Mi2
Anti Jo1

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7
Q

Important screening if dermatomyositis confirmed

A

Malignancy screening e.g. ovarian, breast, lung

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8
Q

Difference with dermatomyositis and polymyositis

A

Polymyositis does not exhibit skin changes, but still linked to malignancy

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9
Q

Management

A

Steroids

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