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Bullous Pemphigoid (Updated Approach)

The most common autoimmune subepidermal blistering disease of older adults.

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

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 Bullous Pemphigoid (Updated Approach)?

Bullous pemphigoid (BP) is the most common autoimmune subepidermal blistering disease, especially in patients older than 70. Autoantibodies target BP180 (collagen XVII) and BP230 hemidesmosomal proteins, leading to dermo-epidermal separation, eosinophilic infiltrate, and tense bullae on a urticarial or eczematous base.

BP is increasingly recognized in association with neurologic disorders (dementia, Parkinson disease, stroke, multiple sclerosis) and with certain medications, particularly DPP-4 inhibitors (gliptins), checkpoint inhibitors, and PD-1/PD-L1 antagonists.

Diagnosis combines clinical morphology, histopathology (subepidermal blister with eosinophils), direct immunofluorescence (linear IgG and C3 along the dermo-epidermal junction), and serology with BP180-NC16A and BP230 ELISAs.

Symptoms

Severe pruritus, often preceding visible lesions for weeks to months
Tense bullae on erythematous or normal skin, predominantly trunk, flexural areas, and proximal limbs
Urticarial plaques, eczematous lesions, or pre-bullous prurigo-like phase
Mild mucosal involvement (10–30%), less severe than pemphigus vulgaris
Healing without scarring, but possible post-inflammatory hyperpigmentation
Negative Nikolsky sign (in contrast to pemphigus)

Risk Factors

Age over 70 years (peak in 80s)
Neurodegenerative disease (Alzheimer dementia, Parkinson disease, stroke)
Drugs: DPP-4 inhibitors (vildagliptin, linagliptin), spironolactone, PD-1/PD-L1 immune checkpoint inhibitors, furosemide
Genetic susceptibility (HLA-DQB1*03:01)
Bedridden status, chronic skin friction or trauma
Sometimes preceded by malignancy, although causal link is debated

When to See a Doctor?

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

  • Persistent pruritus and urticarial-like lesions in older adults that do not respond to antihistamines
  • New tense blisters in an elderly patient
  • Suspicion in a patient on a DPP-4 inhibitor with new pruritic eruption
  • Severe localized BP that worsens despite topical treatment

Treatment Methods

01
High-potency topical corticosteroid (clobetasol propionate 30–40 g/day) — first-line for localized and even generalized disease per modern guidelines
02
Systemic corticosteroids (prednisone 0.3–0.5 mg/kg/day) for extensive or refractory cases, with rapid taper
03
Steroid-sparing options: doxycycline + nicotinamide, methotrexate, azathioprine, mycophenolate mofetil, dapsone
04
Rituximab or omalizumab for refractory and elderly patients with high comorbidity burden
05
Discontinue suspected triggering drugs (especially DPP-4 inhibitors)
06
Wound care, prevention of pressure injuries, prevention/treatment of secondary infection
07
Bone protection, glycemic control, and infection prophylaxis (PJP) on long-term immunosuppression

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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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.