Mixed Germ Cell Tumor with Extensive Yolk Sac Tumor Elements in the Frontal Lobe of an Adult

Figure 2

Proton magnetic resonance spectroscopy (1H-MRS) analysis of a voxel of interest in the nodule (a green area in upper figure) showing an increased ratio (5.02) of choline (Cho) to creatine (Cr) (Cho/Cr) and an apparent peak for lactate (Lac), which is correlated highly with tumor malignancy (lower figure). The peak for N-acetylaspartate (NAA) is within the background noise level.