Laboratory parameters of the 2nd order – depending on the results of the history, physical examination, and obligatory laboratory parameters – for differential diagnostic clarification
- Small blood count
- Differential blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Fasting glucose (fasting blood glucose), if necessary oral glucose tolerance test (oGTT).
- HbA1c (blood glucose long-term memory; the value allows an inference about the level of blood glucose in the last six to eight weeks).
- Ferritin (protein that stores iron)- if iron deficiency anemia is suspected.
- Vitamin levels (folic acid, B12)
- Gastric juice examination
- Tongue swab (for bacteriological and mycological examination).
- Allergy test