MASTOIDITIS
An infection or inflammation of the mastoid air cells.
MASTOIDS
Air containing structure behind the ears that can get infected and full of fluid.
MECKEL’S CAVE
A small cavity space that contains the fibers of the fifth cranial nerve.
MEDIAL
Inner part of something.
MEDIAN STERNOTOMY
Splitting of the sternum during chest surgery, usually a heart surgery.
MEDIAN STERNOTOMY WIRES
Metallic wires used to close up the chest/sternum.
MEDIASTINAL SHIFT
Movement of the mediastinum to the left or right side. This can be seen with a large pneumothorax, lung collapse (atelectasis), pleural effusion or lung mass.
MEDIASTINAL WIDENING
Apparent enlargement of the mediastinum. This can be seen with enlarged lymph nodes, mediastinal masses or bleeding into the mediastinum.
MEDIASTINITIS
Inflammation of the mediastinum.
MEDIASTINUM
Space in the middle of the chest, located between the lungs. It contains the heart, trachea, large blood vessels, esophagus and lymph nodes.