All are true about thymus swelling except –
Thymic shadow does not indent tracheal shadow. A mediastinal shadow indenting tracheal shadow should always be evaluated for a significant pathology.
Thymic swelling may cause widening of anterior mediastinum. Thymic swelling causes a sail-shaped shadow. Thymic swelling may shrink with use of steroids.
Widening of mediastinum on X–ray
Sharp border with sail like appearance
Steroid administration reduces size of swelling
Shift of trachea on X–ray