The patient’s gastrin levels, pituitary and target gland axis hormones, blood and urine catecholamines and their metabolites, aldosterone-renin-angiotensin system, complete blood count, liver and kidney function tests, urinalysis, and tumor markers (AFP, CEA, CA19-9, CYFRA21-1, NSE) were all within normal ranges. The gene discussed is GAST; the disease is neoplasm.