Most common posterior mediastinal tumour is
The most common tumour of posterior mediastinum is neurofibromas,which constitutes around 75% of the total.Other tumors include ganglioneuromas,aneurysm of descending aoa,lymph node mass. Reference:SRB's manual of surgery,5th edition,page no:1126.
Dermoid
Neurofibroma
Lipoma
Lymphoma
Cardio thoracic surgery  