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This study reports the first case of Bullous Pemphigoid (BP) developing during prolonged COVID-19 (SARS-CoV-2 infection). Researchers suggest the viral infection may trigger this autoimmune skin condition, highlighting the need for dermatological surveillance during the pandemic.

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Area of Science:

  • Dermatology
  • Infectious Diseases
  • Immunology

Background:

  • Bullous Pemphigoid (BP) incidence is increasing, particularly in the elderly.
  • COVID-19 (SARS-CoV-2) has been linked to various dermatological manifestations.
  • Pathogenesis of BP involves antigen mimicry and antibody cross-reactivity.

Observation:

  • A case of prolonged COVID-19 presented solely with dermatological symptoms.
  • The initial presentation included maculopapular exanthema and acral vesicular dermatitis.
  • The condition evolved into classic Bullous Pemphigoid, confirmed by histological and serological tests.

Findings:

  • This is the first reported case of Bullous Pemphigoid developing concurrently with COVID-19.
  • The study suggests prolonged SARS-CoV-2 infection may trigger an autoimmune response targeting basement membrane antigens (BP180, BP230).
  • Histological and immunofluorescence findings confirmed the diagnosis of BP.

Implications:

  • Ongoing dermatological surveillance is crucial during the COVID-19 pandemic.
  • Further data collection is needed to assess the incidence of BP in COVID-19 patients.
  • This case highlights a potential, albeit rare, association between SARS-CoV-2 infection and autoimmune blistering diseases.