26th June 2023

A 25-year-old man presents to A&E following an episode of haemoptysis. He also is found to have a blood pressure of 180/110mmHg.

A 25-year-old man presents to A&E following an episode of haemoptysis. He also is found to have a blood pressure of 180/110mmHg. He gives no history of recent illness. He is not on any regular medication. Respiratory and ENT examination is unremarkable.
Blood and urine tests are shown below.

Urinalysis:
Blood ++
Protein ++
Glucose/ketones/leucocytes – negative

Urea 9.8 mmol/L (Baseline 4.5 mmol/L)
Creatinine 174 μmol/L (Baseline 90 μmol/L)

Which of the following blood tests is most likely to be positive?

Select the SINGLE most appropriate option from the list below. Select ONE option only.