Ann Dermatol.  2008 Sep;20(3):146-148. 10.5021/ad.2008.20.3.146.

A Case of Extensive Pityriasis Alba

• Lee D
• Kang JH
• Kim SH
• Seo JK
• Sung HS
• Hwang SW

• KMID: 2156382
• DOI: http://doi.org/10.5021/ad.2008.20.3.146

Abstract

Pityriasis alba (PA) is a common benign disease, characterized by hypopigmented macules or patches on the face, usually seen in children. However, two uncommon variants exist, a pigmenting type and an extensive type. Extensive PA is rare. The lesions tend to be less scaly, more persistent, more generalized, more symmetrical, and more frequently seen over the trunk and less so over the face. We report a child who had extensive PA lesions.

Keyword

Extensive; Hypopigmented; Pityriasis alba

MeSH Terms

Child
Humans
Pityriasis

Figure

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  Fig. 1 Multiple hypopigmented, non-scaling, and non-coalescing patches with indistinct borders involving the whole body.

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  Fig. 2 (A) Histologic examination of the hypopigmented patch revealed hyperkeratosis, focal spongiosis in the epidermis and perivascular inflammatory infiltration (H&E, ×200). (B) Irregularly distributed melanocytes were positive for S-100 protein in the basal layer (S-100 protein, ×200).

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