This 25-year-old presented two weeks ago with a single round , scaly lesion , diagnosed as fungal . The rash is on the trunk , the upper arms and the thighs . What is this condition ?

Mum is concerned about this rash , which has been there for a week . The baby is three weeks old and otherwise well . What could this be ?

Pityriasis rosea Guttate psoriasis Discoid eczema Lichen planus

Eczema Psoriasis Erythema toxicum neonatorum Measles

A parent has brought this seven-year-old to see you . He had a sore throat two days ago and the rash came up yesterday , first in the mouth . What is the likely diagnosis ?

Eczema Measles Hand foot and mouth disease Lichen planus

You are asked to see a 10-year-old girl with these marks on her legs . What is this condition ?

Non-accidental injury Lichen striatus Stretch marks Eczema

Answers 1 Pityriasis rosea This presents with a ‘ herald patch ’, often misdiagnosed as tinea , followed five to 15 days later by multiple , flat , scaly lesions on the trunk and limbs . Management is symptomatic and it should resolve in six weeks . 2 Erythema toxicum neonatorum This is seen in newborns , from a few days up to two weeks old . The rash can spread to the trunk and limbs . It is a clinical diagnosis and needs no treatment . 3 Hand foot and mouth disease This presents with symptoms of a cold followed by a rash in the mouth and then on the feet and the hands . It usually resolves without treatment within seven to 10 days . 4 Lichen striatus This is a rare , selflimiting condition presenting with spots that join to form a band-like appearance . It most commonly occurs in girls aged five to 15 years . No treatment is needed .

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