Fig. 1

a Sagittal T1 and b T2-weighted MRI scans of the thoracic spine reveal a large mass sized 6.1 × 7.4 × 9.5 cm in the right posterior mediastinum from T5-T11, involving the T8 and T9 vertebral body with extension into the spinal canal and compressing the spinal cord. The tumor had a vertebra plana appearance and shows mixed osteolytic and sclerotic bone destruction. c The tumor shows septal contrast enhancement on the coronal T2 view and d internal dystrophic calcification on CT of the chest. e On day + 28 (before the 2nd cycle of chemotherapy), a thoracic spine MRI shows a much-decreased soft tissue tumor in the right posterior mediastinum at T5-T11 level with a residual lesion after removal in the spinal canal from the lower T5 -T9 level with total laminectomy from T6-T10 vertebra. f On day + 286 (after the 9th cycle of chemotherapy), a sagittal T2-weighted MRI on follow-up shows that the soft tissue tumor had almost disappeared from the right posterior mediastinal and intercostal space compared with the previous MRIs