CATECHOLAMINE SECRETING GLOMUS TUMOR-DETECTED BY IODINE-123-MIBG SCINTIGRAPHY

We report the case of a 41-yr-old woman who presented with arterial hy pertension and tinnitus in the right ear synchronous with pulse. She h ad previously undergone surgery for suspected pheochromocytoma without positive therapeutic effect, CT and MRI revealed a homogenous tumor w ith contrast enhancement in the right hypotympanon and foramen jugular e, and [I-123]metaiodobenzylguanidine (MIBG) scintigraphy demonstrated strong tracer uptake in the same area. Selective venous sampling of c atecholamines in the ipsilateral jugular vein confirmed the tumor to h ave originated from hormone production.