Figure 5.

Example of true progression. An 18-year-old woman with pathologically proven glioblastoma. A new irregular ring enhancing lesion (arrow) developed in her right temporal-occipital lobe three months after completion of radiotherapy (a). Hyper-perfusion (arrow) was detected on her DSC-MRI (b), with rCBV value of 1.11. The MRS display Cho/Cr ratio of 4.15 and Cho/NAA 3.95 (c). The enhancing lesions enlarged significantly one month later (d). Tumor recurrence was confirmed pathologically after reoperation.