May NT, Thang DD, Dai NV, Huy NC, Hoa PQ, Cong HA, Tuan PT, Thang DM, Son LM, Hung DQ. Successful surgical removal ofa posterior mediastinal dumbbell tumourat Viet Tiep hospital: A case report. VJCTS. 2020;28:74-77. doi:10.47972/vjcts.v28i.369