“…For smaller-sized tumours, endoscopic mass excision or other limited external intervention has been used, but the CFR technique, which allows en bloc resection, has been shown to improve disease-free survival. Therefore, CFR is an essential part of any treatment regimen (Levine et al, 1986;Fahlbusch et al, 1989;Diaz et al, 2005). In our study, CFR was used as the main treatment modality in patients with advanced stage olfactory neuroblastoma and eight patients in our group were treated with CFR initially.…”