The incidence of chronic urticaria (CU), an idiopathic, heterogeneous condition, is increasing. Despite many studies, there is still uncertainty about the etiology of a large subset of CU.
In the last year or so, 2 French studies of CU have been published in the ARCHIVES,1,2 both reporting the lack of association between CU and 2 distinct conditions (hepatitis C virus [HCV] infection and hypocomplementemia) previously found to be correlated with CU. We completely agree with both reports.
Zauli D, Deleonardi G, Grassi A, Bortolotti R, Lari F, Ballardini G, Bianchi FB. Chronic Urticaria. Arch Dermatol. 2001;137(4):504-505. doi: