[Pigmented Paraganglioma in the Anterior Mediastinum]

Pigmented paraganglioma of the anterior mediastinum is extremely rare. We report a 72-year-old female patient who was pointed out an anterior mediastinum tumor showed by chest computed tomography(CT) scan during a medical check up. The tumor was 50×35 mm showing gradual enlargement and was slightly homogenously contrasted by CT scan and magnetic resonance imaging(MRI). During the resection of the tumor, sudden elevations of both blood pressure up to 205 mmHg and tachycardia up to 131 beat per minate(bpm)was noted on tumor manipulation. Pathologically, the tumor was diagnosed as pigmented paraganglioma with adjacent lymph node metastasis and microscopic extracapsular invasion. The patient is well 5 years post-surgery without recurrence.