1. General surgeon and endocrinologist consultation
2. Gastroscopy with anesthesia and biopsy
3. Ultrasound of the abdominal cavity and thyroid gland
4. Ultrasonography of the heart
5. Electrocardiogram – ECG

Laboratory tests:

1. Complete Blood Count
2. Coagulogram without D-dimer
3. Determination of Blood Group and Rhesus
4. Safe blood analysis
5. Determination of vitamin D in blood
6. Determination of vitamin B12 in blood
7. Determination of (TSH) thyroid stimulating hormone in blood
8. Determination of creatinine in blood
9. Determination of alkaline phosphatase in blood
10. Determination of glycated hemoglobin
11. Determination of C-reactive protein in blood
12. Ferritin
13. Lipase
14. Liver function tests – expanded
15. Determination of albumin in blood
16. Electrolyte balance (sodium, potassium, calcium, magnesium)
17. Determination of (TSH) thyroid stimulating hormone in blood
18. Insulin
19. Lipid profile
20. Determination of cortisol in bloo