Gadolinium-based contrast agents in the follow-up of primary brain tumors

Gadolinium-based contrast agents are used at all stages of MRI evaluation of primary brain tumors. Although they do not precisely measure tumor grade, they are regularly used for diagnosis and surveillance. Radiologists are frequently faced with the issue of repeated exposure of patients to these contrast agents, particularly in children. This review details the various situations in which the use of these contrast agents may be called into question, thanks to the use of other MRI techniques. The authors focus in particular on pediatric and adult gliomas and meningiomas.