logo

DermNet NZ


Facts about the skin from DermNet New Zealand Trust. Topic index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



Laterothoracic exanthem

Laterothoracic exanthem is also known as Asymmetric Periflexural Exanthem of Childhood (APEC). It is an uncommon rash affecting young children, which is suspected to be due to a viral infection.

Clinical features

Laterothoracic exanthem mainly occurs in winter and spring and affects twice as many girls as boys. The average age is two, most cases being between one and five years old.

The rash is often mistaken for eczema (dermatitis) or a fungal infection (ringworm). It usually starts in the armpit or groin and gradually extends outwards, remaining predominantly on one side of the body. It may spread to the face, genitalia, hands or feet.

The rash starts as tiny raised pink spots, which may be surrounded by a pale halo, then slowly becomes flat and scaly. The middle of older patches fades to a dusky grey. Occasionally the patches are net-like or in rings. Little blisters or blood spots may occur. The rash is usually quite itchy.

Sometimes other features of viral infection occur at the onset of the rash, such as a fever, sore throat, cold, vomiting and/or diarrhoea. The lymph glands in the armpits and groins may be enlarged.

APEC APEC APEC
APEC

The rash lasts for several weeks, but always resolves spontaneously within three months.

Treatment

The rash will clear without treatment. The itching can be relieved with:

Related information

References:

On DermNet NZ:

Other websites:

Books about skin diseases:

See the DermNet NZ bookstore

Author: Amanda Oakley, dermatologist

DermNet NZ does not provide an online consultation service.
If you have any concerns with your skin or its treatment, see a dermatologist for advice.