Table 1

 Summary of investigations before referral to tertiary specialist

IBD, inflammatory bowel disease; Ig, immunoglobulin; RAST, radioallergosorbent test.
Haemoglobin 11.5 g/dl (7.2 mmol/l)Normal
White cell count 9.5 × 106/lNormal
Platelet count 315 × 106/lNormal (acute phase reactant in IBD)
Renal functionNormal
Liver biochemistryNormal
C reactive protein <6 mg/dlNormal
Prothrombin time 13 secondsSuggests fat soluble vitamin malabsorption unlikely
Sweat chloride 20 mmol/lNormal
IgG, IgA, IgMNormal on 2 occasions
IgG1–4 subclassesNormal age appropriate values
Endomesial antibodiesNormal on two occasions (once when eating gluten)
RAST to milk and eggNegative on two occasions