Snap Shot A mediastinal mass was found on CXR and a thoracoscopic procedure was performed to remove it. Introduction Most common mediastinal tumors in all age groups login to view 1 more bullet Found in posterior mediastinum in the paravertebral gutters. 50% malignant in childrem, 10% malignant in adults Five histologic types: schwannoma (benign), Neurofibroma (benign), Neurosarcoma (malignant), Ganglioneuroma (benign), Neuroblastoma (malignant) imaging CT treatment Surgical resection