2nd order laboratory parameters – depending on the results of the history, physical examination, and obligatory laboratory parameters – for differential diagnostic clarification.
- Small blood count
- Differential blood count
- Inflammatory parameter – CRP (C-reactive protein)
- Liver parameters – alanine aminotransferase (ALT, GPT), aspartate aminotransferase (AST, GOT), glutamate dehydrogenase (GLDH) and gamma-glutamyl transferase (gamma-GT, GGT), alkaline phosphatase, bilirubin.
- Total IgE; allergen-specific IgE (RAST).
- Allergological testing
- Epicutaneous test (synonyms: patch test, patch test) – in this test, a patch is applied to the patient’s skin containing various allergens; after two to three days, the patch can be removed and the test assessed
- Physical testing
- Provocation testing
- Histamine, tryptase, eosinophil cationic protein (ECP).
- Infectious serology
- Helicobacter pylori serology
- Hepatitis B-/C-Serology
- Stool examination for pathogenic germs, parasites, worm eggs.
- Antinuclear antibodies (ANA) – for suspected systemic lupus erythematosus (SLE).
- Skin biopsy
