Differential diagnoses considered and the investigations requested
| Diagnosis | Relevant investigation |
|---|---|
| • Incomplete Kawasaki disease | Echocardiogram |
| Electrocardiogram | |
| Abdominal ultrasound | |
| • Systemic onset juvenile idiopathic arthritis | Serum ferritin concentration |
| • Systemic lupus erythematosus | Autoantibody screen |
| • Leukaemia | Blood film |
| • Inflammatory bowel disease | White cell scan |
| • Neuroblastoma | Abdominal ultrasound |
| Urine catecholamines | |
| • Abscess, localised infection | White cell scan |
| Abdominal ultrasound |