The mediastinum is the central part of the chest cavity. It contains the heart and its major blood vessels, the esophagus, thymus, trachea, lymph nodes and major nerves.Different types of masses develop in the mediastinum, including benign and cancerous tumors On the chest film there is a mass that has obtuse angles with the mediastinum, so it is a mediastinal mass. The hilar vessels are seen through this mass, so it does not arise from the hilum and probably will arise from the anterior mediastinum.
The mediastinum is divided into three sections: Mediastinal tumors are benign or cancerous growths that form in the area of the chest that separates the lungs. This area, called the mediastinum, is surrounded by the breastbone in front, the spine in back, and the lungs on each side. In children, tumors are commonly found in the posterior (back) mediastinum. These mediastinal tumors often begin in the nerves and are typically benign (noncancerous). In adults, most mediastinal tumors occur in the anterior (front) mediastinum and are generally malignant (cancerous) lymphomas or thymomas. Masses in the anterior portion of the mediastinum can include thymoma, lymphoma, pheochromocytoma, germ cell tumors including teratoma, thyroid tissue, and parathyroid lesions. Masses in this area are more likely to be malignant than those in other compartments. (12,13,14) Treatment of mediastinal Hodgkin's involves chemotherapy and/or radiation. 5 year survival is now around 75%. (15) Large-cell type may have somewhat better prognosis. Surgery is generally not performed because of invasive nature of tumor. Mediastinal masses are caused by a variety of cysts and tumors; likely causes differ by patient age and by location of the mass (anterior, middle, or posterior mediastinum). The masses may be asymptomatic (in adults) or cause obstructive respiratory symptoms (in children).  The mediastinum is the cavity that separates the lungs from the rest of the chest. It contains the heart, esophagus, trachea, thymus, and aorta. The mediastinum has three main parts: the anterior mediastinum (front), the middle mediastinum, and the posterior mediastinum (back). (12,13,14) Treatment of mediastinal Hodgkin's involves chemotherapy and/or radiation. 5 year survival is now around 75%. (15) Large-cell type may have somewhat better prognosis. Surgery is generally not performed because of invasive nature of tumor. Print. The mediastinum is the area that separates the lungs. It is surrounded by the breastbone in front and the spine in back, with the lungs on either side. It encompasses the heart, aorta, esophagus, thymus (a gland in the back of the neck) and trachea (windpipe). Middle mediastinal tumors include: 1  Bronchogenic cysts-a disease in the respiratory system. 2  Lymphadenopathy mediastinal-disease in the lymph nodes. 3  Pericardial cysts which include growths that start in the lining of the heart. On the chest film there is a mass that has obtuse angles with the mediastinum, so it is a mediastinal mass. The hilar vessels are seen through this mass, so it does not arise from the hilum and probably will arise from the anterior mediastinum. The anterior location was confirmed on a CT. When there is a mediastinal mass and you still can see the hilar vessels through this mass, then you know the mass does not arise from the hilum. This is known as the hilum overlay sign. Because of the geometry of the mediastinum most of these masses will be located in mediastinal shift a shifting or moving of the tissues and organs that comprise the mediastinum (heart, great vessels, trachea, and esophagus) to one side of the chest cavity. The condition occurs when a severe injury to the chest causes the entrapment of air in the pleural space (tension pneumothorax).  Anterior (front) mediastinum: Masses that form in the front part of the central chest area include: 1  Thyroid tumors: these grow on the thyroid gland and are typically benign. 2  Thymomas: tumors of the thymus, typically benign. 3  Teretomas: masses of tissue that are typically benign. 4  Lymphoma: a cancer of lymph glands. The mediastinum is the central part of the chest cavity. It contains the heart and its major blood vessels, the esophagus, thymus, trachea, lymph nodes and major nerves. Mediastinal Masses. The mediastinum is the central part of the chest cavity. It contains the heart and its major blood vessels, the esophagus, thymus, trachea, lymph nodes and major nerves. Different types of masses develop in the mediastinum, including benign and cancerous tumor
http://my.clevelandclinic.org/services/heart/disorders/hic_mediastinal_tumors https://en.wikipedia.org/wiki/Mediastinal_tumor http://www.merckmanuals.com/professional/pulmonary-disorders/mediastinal-and-pleural-disorders/mediastinal-masses https://en.wikipedia.org/wiki/Mediastinal_tumor https://www.cedars-sinai.edu/Patients/Health-Conditions/Mediastinal-Tumors.aspx http://www.radiologyassistant.nl/en/p4620a193b679d/mediastinum-masses.html http://medical-dictionary.thefreedictionary.com/mediastinal http://www.swedish.org/services/robotic-surgery-program/conditions-we-treat/mediastinal-masses http://www.swedish.org/services/robotic-surgery-program/conditions-we-treat/mediastinal-masses
what is mediastinal mass