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 location can help determine what type of mediastinal mass 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) Evaluation CT Surgical Managment Surgical resection