AJNR -- Bulakbasi et al. 26 (9): 2187 Figure 1

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FIG 1. A 22-year-old man with low-grade oligoastocytoma (WHO II) in left frontoparietal lobe.

A, Axial T2-weighted spin-echo image (2295/90) shows hyperintense mass involving left insula and temporal operculum.

B, Tumor does not demonstrate contrast-enhancement on axial T1-weighted image (583/15), which suggests a LGGT.

C, Gradient-echo axial perfusion MR image (627/30) with rCBV color overlay map shows a low rCBV_T value of 1.50 and rCBV_P value of 1.18, in keeping with LGGTs.

D, Time-signal intensity and gamma-variate fitted curves from tumoral (red), peritumoral (blue), and normal (purple) areas show prominent decrease in signal intensity from tumoral area. Decreased signal intensity in peritumoral area is at least equal to that of normal gray matter.