This week’s case features a 14-year-old male who had just celebrated his birthday when he presented to hospital with an abnormal full blood count and some concerning symptoms. A blood film was requested for review.

Full blood count result:

• WBC: 81.25 ×10⁹/L
• RBC: 1.08 ×10¹²/L
• Haemoglobin: 114 g/L
• HCT: 0.333
• MCV: 81.6 fL
• MCH: 27.9 pg
• MCHC: 342 g/L
• RDW: 14.3%
• Platelets: 61 ×10⁹/L
• MPV: 10.2 fL

Blood film images:

What do you think it could be? Diagnosis will be shared at the end of the week as always!