0 a structure that divides a body part in the centre: --
a mediastinal tumour
1 the area of the chest that contains the heart and other organs and tissues --
Hours to days later, pleural effusion(s) with or without pneumothorax, widened mediastinum, and subcutaneous emphysema are typically seen.
With a follow-up period ranging from 5 to 185 months, the occurrence of neoplastic disease in the upper mediastinum was not observed in a single case.
A computed tomographic scan of the chest and ultrasonography demonstrated a large cystic mass in the anterior mediastinum, containing fluid and calcified material, which did not communicated with the heart.
The total time of the operation is not necessarily prolonged, as these 10 minutes can be utilized in achieving hemostasis of the mediastinum, while still continuing the ultrafiltration.
It also facilitates fine-needle sampling of the mediastinum if indicated.
When there is systemic venous hypertension, more time is required for dilation and rupture of the lymphatic vessels in the mediastinum and pleural space.
Reported incidents of metastasis and treatment failure in the upper mediastinum appear to be inconsistent.
The security is provided by the ability expeditiously to perform a full sternotomy, and yet have complete access to the entire mediastinum if necessary.
