• FBC and blood film
• reticulocyte count (increased to compensate)
• direct antiglobulin tests (DAT/coombs) positive with Autoimmune haemolytic anaemia
• lactate dehydrogenase (increased with RBC lysis)
• haptoglobin
• haemosiderin urine and haemoglobin may be performed to demonstrate intravascular haemolysis if necessary