title: Pheochromocytoma presenting as recurrent hypotension and syncope.
abstract: We report a case with pheochromocytoma presenting as recurrent syncope due to hypotension. A 71-year-old man was admitted because of recurrent syncope and paroxysmal hypotension. He was diagnosed as having pheochromocytoma. In spite of a large volume of infusion and insulin therapy, syncope and paroxysmal hypotension continued. We speculated that hypotension was mainly due to vasodilatation caused by excess plasma epinephrine and prescribed a non-selective beta-adrenergic blocker. It stabilized blood pressure and syncope disappeared. The right adrenal tumor was excised and he was discharged in good condition. This case report provides some implications for the management of pheochromocytoma complicated with hypotension.
authors.affiliation: Department of Internal Medicine III, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011.
authors.forename: Tamenobu
authors.initials: T
authors.lastname: Ueda
authors.forename: Naoki
authors.initials: N
authors.lastname: Oka
authors.forename: Akira
authors.initials: A
authors.lastname: Matsumoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Miyazaki
authors.forename: Haruya
authors.initials: H
authors.lastname: Ohmura
authors.forename: Toshio
authors.initials: T
authors.lastname: Kikuchi
authors.forename: Moto
authors.initials: M
authors.lastname: Nakayama
authors.forename: Seiya
authors.initials: S
authors.lastname: Kato
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Imaizumi
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000097:blood / Q000150:complications* / Q000601:surgery; D000315:Adrenalectomy; D000368:Aged; D001794:Blood Pressure / Q000502:physiology; D004562:Electrocardiography; D004837:Epinephrine / Q000097:blood; D006801:Humans; D007022:Hypotension / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D010673:Pheochromocytoma / Q000097:blood / Q000150:complications* / Q000601:surgery; D012008:Recurrence; D013575:Syncope / Q000209:etiology* / Q000503:physiopathology
chemical_list: D004837:Epinephrine