Cytomegalovirus antibody concentrations | To exclude current infection | Negative |
Hepatitis B and C antibody concentrations | To exclude current infection | Negative |
Coxiella burnetti antibody concentrations | To exclude current infection | Negative |
Epstein-Barr virus antibody concentrations | To exclude current infection | Evidence of past infection |
Bone marrow culture | To exclude tuberculosis | Negative |
Labelled white cell scan | To exclude current infection | Negative |
Abdominal ultrasound | To look for evidence of tumour, lymphadenopathy, abscess, interstitial liver disease | Normal |
Liver biopsy | To look for evidence of inflammatory or malignant disease | Normal |
Echocardiogram | To look for evidence of endocarditis | Normal |
Barium follow through | To look for evidence of inflammatory bowel disease or lymphoma | Normal |
cANCA | To look for evidence of vasculitis especially Wegener’s granulomatosus | Low titre 1/30 |
Sinus radiographs | To look for evidence of Wegener’s granulomatosus | Bilateral mucosal thickening |