Dermatomyositis

Amuse-bouche today was Gottron's papules and dermatomyositis. A prior post on dermatomyositis here.

A quick review of the associated dermatologic findings:

Gottron’s papules-80% of patients

Hyperkeratotic, erythematous, flat papules

Dorsum MCP and IP joints, less commonly wrists/elbows/knees

Heliotrope rash- <50% of patients

Periorbital violaceous/erythematous rash

One or both eyelids

May be accompanied by edema

Shawl sign

Macular erythema in V shape at nape of neck

Mechanic's hands

Rough and scaly with fissuring

Lateral and palmar areas of fingers

Nail changes

Periungal erythmea

Telangiectasias on the proximal nail fold