Most common tumor in the posterior mediastinum is:
Neurofibroma
Teratoma
Lymphoma
Bronchogenic cyst
Most common tumors in the posterior mediastinum are Neurogenic tumors.
Schwannomas (neurilemmomas) and neurofibromas are the most common neurogenic tumors in adults.
Neurogenic tumors consist of tumors :


Originating from sympathetic ganglia : ganglioma, ganglioneuroblastoma and neuroblastoma.
Originating from intercostal nerves : Schwannoma (neurilemoma), neurofibroma & neurosarcoma.
Originating from paraganglia cells - paraganglioma