<prompt> Not a posterior mediastinal tumor:NeurofibromaLymphomaThymomaGastroenteric cyst  <response>: Posterior Mediastinum Neurogenic tumors MC overall Meningoceles Mesenchymal tumours Pheochromocytoma Lymphoma Bochdalek hernia Bronchogenic cyst Enterogenous cyst EXTRA EDGE: MC anterior MM: ThymomaQ MC middle MM: CystPericardial cyst is MC MC posterior MM: Neurogenic tumors MC MM overall: Neurogenic tumors MM seen in all three compaments of mediastinum: Lymphoma, bronchogenic cyst mesenchymal tumors IOC for diagnosis of MM except neurogenic tumors: CT 