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