An 80-year-old male is admitted with a history of feeling
tired and lethargic and unable to fend for himself.
On examination he is noted to have generalised
lymphadenopathy and an enlarged spleen.
Hb 6.8 g/dL
WBC 30 x 109 /L (94 % lymphocytes)
Platelets 55 x 109/L
Blood film shows spherocytes
In this patient which one of the following would you
arrange to identify the cause of the patientís anaemia?
Osmotic fragility test
Bone marrow examination
Plasma protein electrophoresis