Magnetic resonance imaging:
There are not many reports on MRI findings of a GCTB. Most of them report oval or irregular masses with irregular margins, intermediate signal intensity in T1-weighted images and mild hyperintensity in T2-weighted images, with no surrounding edema [14,41,45]. After contrast injection, most GCTB are described having a homogeneous enhancement, but rim enhancement was also reported. Kinetics is variable. There are reports of slow and rapid enhancement [12,14,16].