The Rash – a spot diagnosis

1. What type of rash is shown? (1 point)

2. List 6 causes of this type of rash. (3 points)

3. Classify the causes of skin purpura . (3 points)

What diagnostic tests would you request in the Emergency Department to exclude serious pathology in this patient? (Suggest 6 investigations, giving the most useful ones first).

You find no abnormalities on examination and the patient’s full blood count, serum electrolytes, ESR, liver function tests and clotting studies are all within the normal range.

Urinalysis performed today is normal. His MSU sent 5 days ago by his GP has grown E. coli, sensitive to trimethoprim.

1. What is the likeliest diagnosis? (1 point)

2. What advice would you give this patient? (2 points)