Gross Total Resection (GTR) Last edited and medically reviewed by Alaric Steinmetz on 29.10.2022 Synonyms GTR The term Gross Total Resection (GTR) is used in neurosurgical tumor surgery and is defined as complete resection of the tumor components visible on MRI1. References Jackson, C., Choi, J., Khalafallah, A.M. et al. A systematic review and meta-analysis of supratotal versus gross total resection for glioblastoma. J Neurooncol 148, 419–431 (2020). ↩ ↩