Question

A 52-year-old woman on methotrexate for rheumatoid arthritis presents with fever, sore throat, and mouth ulcers. What is the most important initial blood test to perform?

Accepted Answer

Full blood count (FBC)

Answer

Erythrocyte sedimentation rate (ESR)

Answer

C-reactive protein (CRP)

Answer

Rheumatoid factor

Answer

Liver function tests

Practice question

A 52-year-old woman on methotrexate for rheumatoid arthritis presents with fever, sore throat, and mouth ulcers. What is the most important initial blood test to perform?