What do we know about palmoplantar pustulosis?

Area of Science:

• Dermatology
• Immunology
• Genetics

Background:

• Palmoplantar pustulosis (PPP) is a chronic skin condition causing sterile pustules on the palms and soles.
• It primarily affects women in their sixth and seventh decades.
• The nosological classification of PPP remains debated, with some viewing it as distinct and others as part of the psoriasis spectrum.

Purpose of the Study:

• To consolidate recent data on palmoplantar pustulosis (PPP).
• To clarify the nosological position of PPP within dermatological classification.
• To review current understanding of PPP's characteristics, genetics, immunology, and treatments.

Main Methods:

• Systematic literature search for recent data on palmoplantar pustulosis (PPP).
• Review of histological, immunological, and genetic studies related to PPP.
• Analysis of patient characteristics and treatment options for PPP.

Main Results:

• Palmoplantar pustulosis (PPP) exhibits clinical features not typically seen in psoriasis vulgaris.
• A significant overlap exists, including the frequent co-occurrence of psoriasis vulgaris and a positive family history of psoriasis.
• These findings indicate a close association between PPP and psoriasis.

Conclusions:

• Palmoplantar pustulosis (PPP) shares characteristics with psoriasis, suggesting a potential link.
• Despite distinct clinical features, current evidence is insufficient to definitively exclude PPP from the psoriasis group.
• Further research is needed to establish the precise nosological position of PPP.