Declaration of patient consent The authors certify that they have obtained all appropriate patient consent forms. Considering the "benign" nature of these tumors, most authors agree that postoperative adjuvant treatment is not necessary in cases where the tumor has been radically resected. Neurosurg Clin N Am 2015;26:21-9. 4 Mallick S, Benson R, Rath GK. Patterns of care and survival outcomes in patients with an extraventricular neurocytoma: An individual patient data analysis of 201 cases.