Widened superior mediastinum
Widened mediastinum. This 71-year-old patient’s CXR shows widening of the superior mediastinum secondary to a large soft tissue density mass to the left of the trachea (yellow arrows). Note the displacement of the trachea to the right side (red arrows). This appearance, in a patient of this age, usually turns out to be due to a goitre (as was the case in this example), however the differential diagnosis includes lymphoma, metastatic lymphadenopathy, thymic tumour and teratoma.