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13th August 2020

A 50-year-old man presents to A&E with a severe headache

A 50-year-old man presents to A&E with a severe headache. He is a recurrent migraine sufferer, but this pain is more severe than usual. On initial examination, he has a raised temperature and a rash. Which of the following would be the most important investigation to discover the diagnosis? 

Select the SINGLE most appropriate investigation from the list below, which would aid in confirmation of this diagnosis. Select ONE option only.

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