Humoral immunological study of pityriasis alba

ABSTRACT

Humoral and complement C3 studies were conducted on 29 Pityriasis alba patients, 18 males and 11 females, whose ages ranged 5-15 years and the mean duration of the disease was 5.4 months. No significant difference was found in serum IgG, IgM, IgE, IgA, and C3 between the patients and the control group. This is in controversy with the hypothesis of Pityriasis alba being a form of atopy and also with the old theory of Pityriasis alba being related to a septic focus or infection, since variations of serum antibodies are expected in these conditions