<unk>  is a procedure that enables visualization of the contents of the mediastinum, usually for the purpose of obtaining a biopsy.<unk>  is often used for staging of lymph nodes of lung cancer or for diagnosing other conditions affecting structures in the mediastinum such as sarcoidosis or lymphoma.<unk>  involves making an incision approximately 1 cm above the suprasternal notch of the sternum, or breast bone. Dissection is carried out down to the pretracheal space and down to the carina. A scope <unk>  is then advanced into the created tunnel which provides a view of the mediastinum. The scope may provide direct visualization or may be attached to a video monitor.<unk>  provides access to mediastinal lymph node levels 2, 4, and 7.
Mediastinoscopy
Mediastinoscope
Axillary dissection
Lymphadenectomy
FNA Mapping
Fine-needle aspiration
Lymph node biopsy
Molecular imaging