Mediastinal tumors are tumors inside the mediastinum, i.e. the cavity between the left and right lungs. Overseas literatures suggest that the most common anterior mediastinal tumors found are lymphoma, thymoma and germ cell tumor. Thymoma accounts for 20% of mediastinal tumor and is the most common anterior mediastinal tumor reaching approximately 50% of all tumors in adults. Ninety percent of …