A 44-Year-Old Man With a Solitary, Slowly Enlarging Mediastinal Lesion.

A 44-year-old man, who does not smoke, presented for investigation of a right mediastinum lesion as revealed on a routine radiograph that was performed as a requirement of his life insurance. The patient reported no associated symptoms. He did not report shortness of breath, cough, sputum, fever, chest pain, or hemoptysis. The remaining review of symptoms was also negative for issues such as muscle weakness, weight loss, night sweats, fatigue, skin rash, and visible, palpable, or painful lymphadenopathy. His medical history was unremarkable, and he did not receive any regular medication. The patient's professional occupation was not related to special exposure and he did not report alcohol consumption, illicit drug use, or any recent travel.