Mediastinal widening – CXR

This 20 year old man presented with supraclavicular swelling, which was clinically suspected to be due to lymphadenopathy. Chest radiograph was performed and showed widening of the mediastinum (arrows). The differential diagnosis for a mediastinal mass like this would include lymphoma, thymoma, germ cell tumour (usually a teratoma) and thyroid enlargement. Not surprisingly, this turned out to be lymphoma (the supraclavicular lymphadenopathy was biopsied under ultrasound guidance).