Mediastinal mass

What it means

A mass in the mediastinum seen on chest imaging is defined as an opacity greater than 3 cm in diameter (without regard to contour, border, or density characteristics).

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category