Widened mediastinum means the central chest area looks broader than expected on imaging.
This is usually a scan finding rather than a symptom. Any symptoms depend on the cause and may include chest pain, breathlessness, cough, or symptoms after major trauma.
Imaging helps when a chest X-ray raises concern and doctors need to know whether the appearance is due to a blood vessel problem, trauma, infection, enlarged lymph nodes, or a chest mass.
Chest X-ray may raise the concern, while CT is often used to clarify whether the cause is vascular, traumatic, inflammatory, or mass-related.
The importance depends on the clinical situation and may range from urgent emergency evaluation to routine further workup.
This entry explains the word. If it appeared on your report, the next step is getting that report interpreted for your case.