Peeling skin syndrome 2 (PSS2)

Peeling skin syndrome 2 (PSS2)

Overview

Peeling skin syndrome 2 (PSS2), also known as Acral Peeling Skin Syndrome (APSS), is a rare, inherited skin disorder characterized by painless, continuous exfoliation of the top layer of skin, particularly on the hands and feet. It is caused by genetic mutations, often in the \(TGM5\) gene, and is often worsened by heat, humidity, and moisture.

Symptoms

Localized Peeling: Primary, ongoing exfoliation of the skin on the palms of the hands and soles of the feet, occasionally extending to the arms and legs.

Painless Exfoliation: The skin peels off in sheets or patches, often without pain, itching, or redness, although it can be temporarily red and itchy (erythema).

Triggered by Moisture: Skin shedding is accelerated by humidity, sweating, and heat.

No Scarring: Despite the constant peeling, the skin underneath usually heals without scarring.

Onset Timing: Symptoms frequently appear at birth or in early childhood, although they may appear later in life

Causes

Genetic Mechanism: It is inherited in an autosomal recessive pattern, meaning an affected individual inherits a mutated gene from both parents.

\(TGM5\) Gene Mutation: Mutations in this gene reduce the activity of transglutaminase 5, a crucial enzyme for building the cornified cell envelope.

Protein Defect: This shortage weakens cell-to-cell adhesion in the epidermis, leading to spontaneous peeling, particularly on the hands and feet.

Trigger Factors: The peeling is often triggered or worsened by moisture, heat, and friction (e.g., sweating).

Alternative Causes: In rare instances, APSS can be caused by mutations in the \(CSTA\) gene, which encodes cystatin A

Diagnosis

Location: Primarily affects the dorsal surfaces of hands and feet, though it may extend to limbs.

Nature of Peeling: Continuous, spontaneous, and painless, typically occurring at the stratum granulosum-stratum corneum junction.

Exacerbating Factors: Symptoms are often worsened by heat, humidity, and friction.

Presentation: Sometimes accompanied by painless redness (erythema) or itching.

Treatment

Moisturizing Agents: Regular use of emollients and thick creams (e.g., urea, lactic acid) keeps skin hydrated.

Preventative Care: Avoid known triggers like heat, humidity, friction, and excessive sweating.

Wound Care: While peeling is usually painless, any open, tender, or blistered areas should be kept clean to prevent secondary infections.

Protection: Wear comfortable, breathable shoes to reduce sweating on feet, and avoid harsh detergents or excessive washing of hands.

Type of Doctor Department : A dermatologist

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