2nd January 2024

A 48-year-old male presents with sudden, painless loss of vision of the right eye

A 48-year-old male presents with sudden, painless loss of vision of the right eye. Funduscopy reveals diffuse retinal haemorrhage and dilated veins. The patient also reports new-onset haematuria and haemoptysis. Which of the following laboratory tests would be positive in the disease that is precipitating these ocular findings?

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