Abstract
BACKGROUND: Paragangliomas are tumors that arise from extra-adrenal chromaffin cells. Herein, we present a rare case of a functional paraganglioma in the posterior mediastinum. CASE PRESENTATION: A 36-year-old man presented with paroxysms of chest pain and headache. At presentation, the patient's blood pressure was 190/120 mmHg. Chest computed tomography and magnetic resonance imaging revealed a left paravertebral mass in the posterior mediastinum. (123)I-metaiodobenzylguanidine scanning revealed focally high tracer uptake in the left paravertebral area. The metanephrine level in the urine was elevated, confirming a rare, catecholamine-producing, functional paraganglioma in the posterior mediastinum. Before surgery, the patient was prepared by orally administering α- and β-adrenergic blockers. The mass was then resected via a lateral thoracotomy. The metanephrine level in urine was normal 24 h after surgery. CONCLUSIONS: Paragangliomas in the posterior mediastinum are very rare, but more than half of all cases are functional. The associated symptoms are curable with complete resection, and long-term follow-up for recurrence is important.