[Intraoperative diagnosis of a mediastinal paraganglioma: Anesthetic management].

A 45-year-old woman with a posterior mediastinal tumor underwent right thoracotomy for resection, developing hypertension and difficult-to-control tachycardia while the tumor was being manipulated. A catecholamine-secreting tumor was suspected, the operation halted, and the patient prepared for surgery at a later time. The tumor was a mediastinal paraganglioma and the final outcome was satisfactory.