The word "mediastinal" is used to describe certain structures, organs, or processes that are located in the mediastinum. The mediastinum is the central compartment of the thoracic cavity that separates the lungs and contains various tissues and organs such as the heart, major blood vessels, esophagus, trachea, lymph nodes, and nerves. Some synonyms for the term "mediastinal" include thoracic, mid-thoracic, central thoracic, parasternal, and interpleural. These synonyms can be used interchangeably to describe different aspects of the mediastinum, such as the location, size, function, or pathology of its components. For example, a mediastinal mass could also be referred to as a thoracic mass or a parasternal tumor.