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Wistar rat (no. 21) that received C6-ICLC glioma cells. (A) Transverse and (B) dorsal T2-weighted MR images on day 20 reveal a 42-mm3 hyperintense mass. (C) Transverse and (D) dorsal T2-weighted MR images on day 30 show that the mass is reduced (6 mm3) and less well-defined than on day 20, with a hyperintense core surrounded by a hypointense rim (arrows).
