Primarily neurofibromas and neurolemmomas in adults, ganglioneuromas and neuroblastomas in children. Chemodectomas (any mediastinal compartment) and pheochromocytomas are extremely rare. There may be associated rib or vertebral erosion, calcification, and a dumbbell appearance (part of the tumor is inside and part outside the spinal canal).
Neurogenic tumor. (A) Frontal and (B) lateral views of the chest demonstrate a large right posterior mediastinal mass.