Contents
Common benign disease, characterized by hypopigmented macules or patches on the face, usually seen in children.
Aetiology
- History of atopy (M/C):
- Atopic dermatitis
- Allergic rhinitis
- Asthma
- Sun exposure
- Poor cutaneous hydration
- Xerosis
- Mineral deficiencies
Pathophysiology
Histopathology:
Clinical features
Asymptomatic (or mildly pruritic), hypopigmented lesions, often on the face.
Rare variants:
- Extensive PA:
- Characterized by widespread, symmetrical, and more persistent involvement of the skin, lesions distributed predominantly on the trunk rather than on the face, a higher female-to-male ratio, and the histologic absence of spongiosis
- Pigmenting PA:
- Lesions have a central zone of bluish hyperpigmentation surrounded by a hypopigmented halo.
- Often associated with dermatophyte infection and are found primarily in darker skin types
