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Dermatomyositis: Cutaneous Findings

Idiopathic inflammatory myopathy with characteristic cutaneous manifestations including heliotrope rash, Gottron papules/sign, shawl sign, and mechanic's hands; can occur with or without muscle involvement (clinically amyopathic) and may have associated malignancy risk.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dermatoloji department. Book Appointment →

What is Dermatomyositis: Cutaneous Findings?

Dermatomyositis (DM) is a systemic autoimmune connective tissue disease characterized by cutaneous and muscular inflammation. Pathognomonic skin findings include the heliotrope rash (violaceous discoloration of upper eyelids with periorbital edema) and Gottron papules (erythematous-violaceous papules over MCP/PIP/DIP joints), considered diagnostic.

Other cutaneous features include Gottron sign (macules over MCP/PIP/DIP), V-sign (anterior chest erythema), shawl sign (upper back/shoulders erythema), holster sign (lateral thighs), facial erythema, photosensitivity, mechanic's hands (hyperkeratotic fissured palms/lateral fingers), periungual telangiectasias and ragged cuticles (Samitz sign), calcinosis cutis (especially in juvenile DM), and poikiloderma.

Muscle involvement causes symmetric proximal weakness (difficulty rising from chair, climbing stairs, lifting arms). Some patients have skin findings without muscle weakness (clinically amyopathic DM, CADM). Myositis-specific autoantibodies aid diagnosis and prognosis: anti-Mi2 (classic DM, good prognosis), anti-MDA5 (CADM, severe ILD, low malignancy), anti-TIF1γ (high malignancy risk in adults), anti-NXP2 (calcinosis, malignancy), anti-Jo1 (anti-synthetase syndrome with ILD/mechanic's hands).

Symptoms

Heliotrope rash (violaceous upper eyelids, periorbital edema)
Gottron papules/sign (over MCP, PIP, DIP joints)
V-sign (anterior chest), shawl sign (upper back), holster sign
Photosensitive facial erythema, scalp erythema and pruritus
Mechanic's hands (hyperkeratotic fissured palms/lateral fingers)
Periungual telangiectasias, ragged cuticles, calcinosis cutis

Risk Factors

Female sex (2-3:1 predominance)
Adult age (40-60 years) and juvenile (5-15 years) bimodal peaks
Underlying malignancy (especially anti-TIF1γ positive: ovarian, lung, breast, GI, lymphoma)
Anti-MDA5 positivity (severe rapidly progressive ILD)
Photosensitivity, UV exposure
Genetic predisposition (HLA-DR3 in adults, HLA-DR15 in juvenile)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Violaceous discoloration of eyelids (heliotrope rash)
  • Erythematous papules over knuckles (Gottron)
  • Photosensitive facial erythema with pruritus
  • Proximal muscle weakness (rising, climbing stairs)
  • Painful palmar fissures (mechanic's hands)
  • Calcium deposits in skin or subcutaneous tissue

Treatment Methods

01
Skin examination, muscle strength testing, CK/aldolase/ALT/AST
02
Myositis-specific autoantibody panel (anti-Mi2, anti-MDA5, anti-TIF1γ, anti-NXP2, anti-Jo1, etc.)
03
Skin biopsy (interface dermatitis, mucin), muscle biopsy if myositis suspected
04
Age-appropriate malignancy screening (especially anti-TIF1γ positive)
05
HRCT chest for interstitial lung disease (especially anti-MDA5)
06
First line: systemic corticosteroids (prednisone 0.5-1 mg/kg/day) plus hydroxychloroquine
07
Steroid-sparing: methotrexate, mycophenolate mofetil, azathioprine
08
Refractory or severe (rapidly progressive ILD, dysphagia): IVIG, rituximab, cyclophosphamide, JAK inhibitors (tofacitinib)
09
Strict photoprotection (sunscreen SPF 50+, protective clothing); calcinosis treatment limited

Which Department to Visit?

You can visit our Dermatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Let us help you

You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.