How is chronic lymphocytic leukaemia diagnosed?

Often the condition is diagnosed by chance when blood tests are being performed for other reasons.
Although a blood test may give doctors the diagnosis, a bone marrow test is usually done to confirm the diagnosis. Special tests are performed on these samples to help classify the leukaemia as this will influence the kind of treatment required.
Scans and X-rays may also be performed in order to help doctors decide on the best treatment.