![Show Menu](styles/mobile-menu.png)
![Page Background](./../common/page-substrates/page1396.jpg)
BULKY LESION DEFINITION
The definition of bulk has evolved as imaging modalities have changed.
The most common one is based on results of a chest X-ray, and bulky disease is defined based on the ratio of
the maximum width of the mediastinal mass and the maximum intrathoracic diameter on standing
posterior-anterior X-ray (mediastinal mass ratio [MMR] > 0.33)