Pemphigus Vulgaris — Oral Blistering Autoimmune Disease

Why early recognition matters

Untreated pemphigus vulgaris carried >90% mortality before steroids. Early diagnosis from oral lesions — before skin involvement — dramatically improves outcomes. Any chronic, painful oral erosion with a positive Nikolsky sign in an adult deserves urgent biopsy with direct immunofluorescence.

Treatment

Modern care has transformed prognosis but requires close monitoring.

• High-dose systemic corticosteroids for induction
• Steroid-sparing agents: azathioprine, mycophenolate mofetil
• Rituximab — increasingly first-line in moderate-to-severe disease
• Topical clobetasol for oral lesions as adjunct
• Soft, non-acidic, non-spicy diet during active disease
• Multidisciplinary care with dermatology

Distinguishing PV from look-alikes

Pemphigus vulgaris must be told apart from mucous membrane pemphigoid (subepithelial, fewer skin lesions, scarring), erosive lichen planus (lacy white component, milder course), and major aphthae (recurrent, well-defined, heal between episodes). DIF on perilesional mucosa is the decisive test; antibodies against desmoglein-3 confirm.

Living well with pemphigus

Oral comfort matters as much as immunology. Use a soft toothbrush, alcohol-free mild rinses, topical anaesthetic before meals during flares, a soft and non-acidic diet, and adequate calorie intake (weight loss from poor eating is a real risk). Regular dental review prevents secondary candidiasis and caries from steroid use.

Monitoring on immunosuppression

Treatment requires regular blood counts, liver and renal function, blood pressure, glucose and bone health monitoring; vaccination review (avoid live vaccines on biologics); and infection vigilance. Coordination with dermatology / rheumatology is essential.