Aetiology of inflammatory bowel disease associated anaemia
| 5-ASA, 5-aminosalicylic acid; 6-MP, 6-mercaptopurine. | |
| Common | Iron deficiency |
| Anaemia of chronic disease | |
| Occasional | Cobalamin deficiency |
| Folate deficiency | |
| Drug induced (sulphasalazine, 5-ASA, 6-MP, azathioprine) | |
| Exceptional | Haemolysis |
| Myelodysplastic syndrome | |
| Aplastic anaemia | |
| Glucose-6-phosphate dehydrogenase deficiency | |