Annular erythema of infancy

Annular erythema of infancy is a rare, benign skin condition that typically presents in the first two years of life. It is characterized by the appearance of annular or ring-shaped, erythematous patches on the skin. The condition is self-limiting and usually resolves without treatment.

Etiology

The exact cause of annular erythema of infancy is unknown. However, it is believed to be a hypersensitivity reaction to an unknown antigen. Some researchers suggest that it may be related to viral infections, but this theory has not been definitively proven.

Clinical Presentation

Annular erythema of infancy typically presents as annular or ring-shaped, erythematous patches on the skin. These patches may be single or multiple and can vary in size. They are usually located on the trunk and extremities, but can also appear on the face. The patches are not associated with any symptoms and do not cause discomfort to the child.

Diagnosis

The diagnosis of annular erythema of infancy is primarily clinical, based on the characteristic appearance of the skin lesions. A skin biopsy may be performed to rule out other conditions, but is not typically necessary. The condition is often misdiagnosed as tinea corporis or erythema migrans, due to the similar appearance of the skin lesions.

Treatment

As annular erythema of infancy is a self-limiting condition, treatment is usually not necessary. The skin lesions typically resolve on their own within a few weeks to months. In some cases, topical corticosteroids may be used to speed up the resolution of the lesions.

Prognosis

The prognosis for annular erythema of infancy is excellent. The condition is benign and does not cause any long-term complications. The skin lesions usually resolve completely without leaving any scars.

See Also

• Erythema annulare centrifugum
• Erythema multiforme
• Erythema migrans