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Generalized pustular psoriasis (GPP) is a severe skin condition. This case highlights GPP development during corticosteroid dose reduction, successfully treated with acitretin.

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Area of Science:

  • Dermatology
  • Clinical Case Study
  • Psoriasis Research

Background:

  • Generalized pustular psoriasis (GPP), also known as von Zumbusch psoriasis, is a severe, acute form of psoriasis.
  • GPP typically arises in individuals with pre-existing psoriasis experiencing aggravating factors.

Observation:

  • A 70-year-old female patient presented with GPP symptoms.
  • These symptoms emerged during a tapering dose of oral corticosteroids, initially prescribed for suspected acute generalized exanthematous pustulosis (AGEP).

Findings:

  • The differential diagnosis for GPP includes other pustular dermatoses like subcorneal pustulosis, IgA pemphigus, and notably, AGEP.
  • The patient's personal history of psoriasis and histopathological findings, including psoriasiform changes and subcorneal pustules, supported the GPP diagnosis.
  • Treatment with acitretin 30 mg/day led to complete regression of the lesions.

Implications:

  • This case underscores the importance of considering GPP in patients with psoriasis experiencing flares during corticosteroid withdrawal.
  • Accurate differential diagnosis is crucial, distinguishing GPP from conditions like AGEP.
  • Acitretin demonstrates efficacy in managing GPP, offering a treatment option for complete lesion regression.