Pityriasis alba - Skin in Child
This disorder is common in all ethnicities, although the hypopigmented lesions are more obvious in patients with dark skin.
The disorder is associated with dry skin (xerosis) and is frequently not pruritic.
L30.5 – Pityriasis alba
402296004 – Pityriasis alba
- Extensive cases may resemble the hypopigmented form of tinea versicolor, especially if hypopigmentation involves the face.
- In vitiligo, the patches are completely depigmented and very well demarcated.
- Unlike pityriasis alba, tinea corporis usually has raised borders.
- Topical medication such as retinoic acid, benzoyl peroxide, and potent topical steroids may present in a similar fashion.
- Psoriasis usually has a thicker scale and more well-defined border than pityriasis alba.
- Atopic dermatitis – Pityriasis alba may be a manifestation of postinflammatory hypopigmentation, seen in individuals with atopic dermatitis.
- Although similar, seborrheic dermatitis is less commonly seen in preschoolers and school-aged children.
- Nummular dermatitis is usually more well defined, the lesions are raised with more prominent scale, and there is intense pruritus.
- Mycosis fungoides, which has a hypopigmented variant, is very rare.
- Tuberous sclerosis usually includes hypopigmented patches on the trunk and presents at birth with associated seizure, mental retardation, and other skin lesions; shagreen patches and angiofibromas.
- HIV-associated dermatitis
- Leprosy can cause hypopigmented patches.