On chest X-ray for cough and chest pain, an occasional finding was left paramedian mediastinal widening.

A non-contrast CT scan revealed a hypodense nodularity with contextual calcifications in the left paramedian mediastinal area. 

The patient underwent a TC examination with contrast at another clinic.
He underwent removal of the nodule with a histological finding of malignant thymoma.
He underwent a follow-up X-ray 2 months after surgery.