Fig. 2

A noncontrast computed tomographic (CT) image shows severe compression of the esophagus and trachea by an approximately 8.3 × 7.5 × 4-cm lobulated tumor with multiple coarse calcifications at right upper mediastinum (a–d). Endoscopy shows a discrete compressed region of the trachea (e, f). The 3-D model of the trachea derived from CT images (g). The trachea moderately recovered after the insertion of a T-tube stent (i). CT scan and endoscopy of the trachea returned to normal after surgery (h, j). Empty red arrows mark the trachea; solid red arrows mark the chondrosarcoma; yellow arrows mark different sites of the trachea stenosis; blue arrow marks the site of tracheostomy