<prompt> Most common tumor in the posterior mediastinum isNeurofibromaTeratomaLymphomaBronchogenic cyst  <response>: Most common tumour of posterior mediastinum is neurofibromas constituting 75 of the total.Others include ganglioneuromas,aneurysm of descending aoa,lymph node mass. Reference: SRBs manual of surgery,5th edition,page no:1126. 