Fig. 1

Image findings of case 1. a, b Preoperative posterior-anterior and lateral X-rays of the whole spine in assisted sitting position shows severe scoliosis with exaggerated cervicothoracic hyperlordosis. c Preoperative contrast enhanced computed tomography at T2 demonstrates a flattened tracheal lumen between innominate artery and anteriorly deviated vertebra. d, e Postoperative posterior-anterior and lateral X-rays of the whole spine in assisted sitting position reveals well-corrected cervicothoracic alignment. f Postoperative computed tomography demonstrates the expansion of the narrowed tracheal lumen.The white arrow in (c) indicates the innominate artery compressing the trachea from the anterior aspect. The white arrowheads in (c) and (f) indicate the tracheal lumen