A 27-year-old woman complained of palpitations and shortness of breath. She has a life-long history of menorrhagia but has declined therapeutic investigations/interventions. Examination Hemoglobin (Hb): 8.2 g/dL (normal 11.5–16 g/dL) White cell count (WCC): 5.2 × 109/L (normal 4–11 × 109/L)      Platelets: 513 × 109/L (normal 150–400 × 109/L) Mean cell volume (MCV): 69 fL (normal 80–100 fL) Mean cell Hb (MCH): 23 pg (normal 27–33 pg) Serum ferritin: 3 ng/mL (normal 6–81 ng/mL).

What is the differential diagnosis? *This case is from Docplexus editorial team for educative purpose only Source: Core clinical cases in medical and surgical specialities