A 12 year old girl presents with worsening exertional dyspnea, fatigue, and multiple episodes of fever over the last 3 weeks. She also noticed several bruises over her legs during the last week which could not be attributed to trauma.
She had an episode of glandular fever 2 months ago, with an uneventful recovery. Her medical history is otherwise unremarkable, and there is no family history of hematologic disorders.
She is not on any medications, and consumes a normal diet.