Materials and Methods: A case series study, all case of adrenal cancers with tumor thrombus jutting into the inferior cava vena were performed adrenalectomy with removal of tumor intravascular extension at Cho Ray Hospital from 09/2016 to 08/2017. Analyzing age, sex, tumor size, stage of cancer, endocrine secretions, Operative time, blood loss, the hospital stay, intra - or post - operative complication, surgical pathology.