title: What not to do in pheochromocytoma.
abstract: Use of a screening VMA procedure rather than a specific assay may yield false-positive results. Plasma catecholamine levels should be obtained in the unstressed, supine patient. Pharmacologic tests are less reliable than chemical tests. In the presence of a pheochromocytoma, phenoxybenzamine should be administered before any manipulative procedures, as well as prior to surgery. This agent should be given along initially; propranolol may be added preoperatively.
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000628:therapy; D006801:Humans; D010643:Phenoxybenzamine / Q000008:administration & dosage / Q000627:therapeutic use; D010673:Pheochromocytoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000628:therapy; D011433:Propranolol / Q000008:administration & dosage / Q000627:therapeutic use; D011859:Radiography
chemical_list: D010643:Phenoxybenzamine; D011433:Propranolol