Utility of PET in the mediastinum; Diagnostic strategies for mediastinal tumors and masses; Infections of the mediastinum; Genetic markers of mediastinal diseases; Mediastinal tumors and cysts in the pediatric population; Multimodality treatment of germ cell tumors of the mediastinum; Surgical approaches to the thymus in patients with MG; Multimodality treatment of thymoma; Vascular lesions of the mediastinum; Combined cervico - thoracic approaches for complex mediastinal masses; Intraoperative strategy in patients with extended involvement of mediastinal structures; The role of surgical resection for locally recurring mediastinal tumors; Modern Radiotherapy for Mediastinal Disease; Surgery of the mediastinum -historical notes.