Fig 1.

Typical MR imaging of EBL (patient 11), presenting as large hemispheric tumor mass. Note the well-delineated tumor margins and absence of surrounding edema. MR signal intensity is high in T2WI (A) and iso- to hypointense in T1WI (B). The tumor shows moderate enhancement of some parts after gadolinium administration (C). ADC map shows low signal (D, see also Fig 5B). Single-voxel MR spectroscopy (E) of the tumor with a choline:NAA ratio of 5:1, indicating high cellularity. There is a small peak for lactate at 1.3 ppm. A signal for lipids was not detected in this case (3T Trio; Siemens, Erlangen, Germany).