1st April 2022

A 15-year old boy presents to an emergency department with a swollen joint after playing football with his friends

A 15-year old boy presents to an emergency department with a swollen joint after playing football with his friends. His older brother was diagnosed with haemophilia B when he was 5 years old; the patient has never had symptoms prior to the current incident. Which parameter is most likely to be abnormal in his blood results?

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