Pathology For which one of the following tumours Gastrin is a biochemical marker: A Medullary carcinoma of thyroid B Pancreatic neuroendocrine tumour C Pheochromocytoma D Gastrointestinal stromal tumor 💡 Explanation For which one of the following tumours Gastrin is a biochemical marker: ✓ Correct Answer: B. Pancreatic neuroendocrine tumour