25th July 2024

A 48-year-old gentleman has a routine blood test as an outpatient. You note that he has a history of hereditary spherocytosis

A 48-year-old gentleman has a routine blood test as an outpatient. You note that he has a history of hereditary spherocytosis and had previous surgery when he was 28. He reports having had multiple haemolytic episodes prior to this, which have now improved. He is called in to discuss the result.

P Mourao, CC BY-SA 3.0,

What is the abnormality indicated by the arrow in the above blood film?

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