RESUMO
Urticaria multiforme is a condition which manifests as acute, polycyclic, annular oedematous pink plaques with an ecchymosis hue that is associated with acral edema. The condition is often misdiagnosed as erythema multiforme, serum-sickness-like reactions, or urticarial vasculitis. Author present a case of acute annular urticaria in a 3-year-old girl who presented with unusual clinical manifestations of the condition. Through this case report, Author aim to emphasize the wide range of morphologic manifestations that can be seen in urticaria multiforme. This can assist pediatric physicians to differentiate urticaria multiforme from other clinical dermatologic conditions and prevent misdiagnosis. A detailed case history and physical examination, along with relevant diagnostic tests can enable prompt and effective management of the condition.
RESUMO
Urticaria multiforme is a cutaneous condition observed in children. This self-limited condition is characterized by well-circumscribed, annular, and erythematous wheals, which spontaneously disappear within a few days. Patients commonly present with acral edema and show a favorable response to antihistamines. It is frequently misdiagnosed as erythema multiforme or serum sickness-like reaction owing to distinctive annular wheals with an ecchymotic center observed in patients. This condition was previously known as acute annular urticaria. The term urticaria multiforme was introduced in 2007 to highlight this specific variant of urticaria. We describe 2 patients with acral edema and transient annular wheals with dusky red centers, which were diagnosed as urticaria multiforme lesions. To our knowledge, the Korean literature includes only a single case report describing acute annular urticaria. However, the report does not use the term ‘urticaria multiforme’ to describe this condition.