Dermatology Quiz

Hyperpigmented and superficially eroded rash

Date Posted: 20/12/2013

Figures 1a and b. The patient’s mildly irritated rash, shown here affecting the cubital fossa (a, above) and neck (b, below).

An 8-year-old boy presents with a two-week history of a mildly irritable rash on the cubital fossae, popliteal fossae and neck.

What is the cause of the rash in this child, who has a history of atopic dermatitis?

Alopecia in a 12-year-old girl

Date Posted: 29/11/2013

Figure. The rapidly expanding area of alopecia on the patient’s scalp. The raw area shows where there has been an attempt to insert a drain.

A 12-year-old girl presents with a rapidly expanding area of alopecia on her scalp.

What is the correct diagnosis and how should she be managed?

Asymptomatic facial rash in a boy

Date Posted: 08/11/2013

Figure 1. The patient’s facial rash at presentation.

An 8-year-old boy presents with an asymptomatic but unsightly facial rash.

What is the diagnosis and how should the rash be managed?

A painful violaceous lesion on the thigh

Date Posted: 25/10/2013

Figure. The violaceous lesion at presentation.

A 48-year-old woman presents with a painful lesion on her thigh.

What is the diagnosis and how should she be managed?

Sudden onset of blisters on the arms and neck

Date Posted: 06/09/2013

Figure 1. The patient’s rash at presentation.

A 56-year-old woman presents with sudden onset of a bilaterally symmetrical blistering eruption on her neck and forearms.

What is the most likely cause of this rash and what would you consider in the differential diagnosis?

A tender rash on the legs

Date Posted: 27/08/2013

Figure. The patient’s rash at presentation.

A 14-year-old boy presents with a slightly tender rash on both lower legs a week after an attack of tonsillitis. He had been previously well.

What is the most likely diagnosis and how should the patient be managed?

An enlarging lesion on the neck

Date Posted: 26/07/2013

Figure 1. The lesion occurring on the patient’s neck, which has recently enlarged and become more prominent.

A 13-year-old boy presented with a raised, hyperkeratotic, warty lesion on his neck.

What is the diagnosis of this enlarging lesion?

Recurrent itchy papules in a 12-year-old boy

Date Posted: 17/06/2013

Figure 1. The itchy papular rash on the patient’s hands and knees. The rest of the skin is normal.

A 12-year-old boy has developed itchy papules on the palms, soles, elbows and knees each spring for the last three years.

What is the differential diagnosis and treatment of the most likely cause?

Sudden onset of blistering lesions in a young boy

Date Posted: 10/05/2013

Figure 1a. Blistering lesions on the patient’s arm.

A 12-year-old boy presents with sudden onset of blistering lesions on his arms and legs, occurring a few days after he developed a typical cold sore on his upper lip.

What is the most likely diagnosis?

Asymptomatic annular lesions on the hand

Date Posted: 26/04/2013

Figure 1. Asymptomatic annular lesions on the dorsum of the patient’s hand.

A 35-year-old man has two asymptomatic, annular lesions on the dorsum of his left hand, which have slowly expanded over the past three months.

What is the differential diagnosis of these lesions?

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