This blood film (left) and bone marrow aspirate (right) are from an elderly woman who has been receiving treatment from a haematologist for many years

A	This is likely to represent centroblastic transformation of follicular lymphoma
B	This is likely to represent Richter's syndrome in chronic lymphocytic leukaemia
C	This is likely to represent acute myeloid leukaemia as a consequence of previous alkylating agent therapy
D	The abnormalities present represent a response to opportunistic viral infection in an immunosuppressed patient