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Linear IgA Dermatosis

Subepidermal autoimmune blistering disease with linear IgA deposition

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 Linear IgA Dermatosis?

Linear IgA dermatosis (LAD) is an autoimmune blistering disease in which IgA antibodies are deposited in a linear pattern along the basement membrane zone (BMZ). Target antigens include LAD-1, the soluble extracellular domain of BP180, and LABD97. Two clinical forms are recognized: chronic bullous disease of childhood (CBDC) in pediatric patients and adult-onset linear IgA dermatosis.

In the pediatric form, lesions cluster in the perineal, lower abdominal, and gluteal regions in a 'cluster of jewels' pattern. The adult form involves the trunk and extremities and may be drug-induced (vancomycin most common). It must be differentiated clinically and immunopathologically from dermatitis herpetiformis.

Direct immunofluorescence (DIF) is diagnostic: a continuous linear IgA band along the basement membrane is seen. Treatment relies on dapsone and sulfapyridine, with corticosteroids in selected cases.

Symptoms

Tense vesicles and bullae
Cluster of jewels (string of pearls) pattern
Annular and polycyclic plaques
Pruritus and burning sensation
Mucosal involvement (oral, ocular)
Perineal and gluteal involvement (children)

Risk Factors

Drugs (vancomycin, captopril, NSAIDs)
Infections (upper respiratory tract)
Inflammatory bowel disease
Lymphoproliferative malignancies
Autoimmune disease background
HLA-B8 and HLA-DR3

When to See a Doctor?

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

  • New tense vesicles and bullae
  • Annular vesicular pattern (string of pearls)
  • Mucosal lesions and ocular pain
  • Vesicular eruption after vancomycin treatment
  • Persistent pruritus and burning

Treatment Methods

01
Skin biopsy with hematoxylin-eosin and direct immunofluorescence
02
G6PD level (before dapsone)
03
Dapsone (50-150 mg/day)
04
Sulfapyridine (alternative)
05
Topical and systemic corticosteroids
06
Discontinue causative drug (drug-induced cases)

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.