title: Diagnosis of occult Zollinger-Ellison tumors by gastrin radioimmunoassay.
mesh_terms: D007516:Adenoma, Islet Cell / Q000473:pathology; D000328:Adult; D004379:Duodenal Neoplasms / Q000473:pathology; D005260:Female; D005743:Gastrectomy; D005755:Gastrins / Q000097:blood*; D006801:Humans; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay; D014680:Veins; D015043:Zollinger-Ellison Syndrome / Q000175:diagnosis* / Q000601:surgery
chemical_list: D005755:Gastrins