Chronic spontaneous urticaria or urticarial vasculitis remains a possible diagnosis, but the persistence of an urticarial lesion beyond 24 hours suggests that the latter diagnosis is more probable.

and include disorders such as leukocytoclastic vasculitis and urticarial vasculitis. The clinical presentation is diverse; lesions may appear as palpable purpura, persistent urticarial plaques ...

Urticarial vasculitis represents 5% to 10% of cases of chronic urticaria, characterized histologically by the presence of vasculitis on skin biopsy. Clinically it tends to last longer than ...

For patients with signs and symptoms indicative of urticarial vasculitis (UV), establishing a differential diagnosis often presents physicians with a host of challenges, in large part because of ...