PMC3271616_01
(a) T1-weighted contrast-enhanced image showing variegated contrast uptake by the tumor. (b) Sagittal section showing pontine tumor completely occluding the fourth ventricle. (c) Photomicrograph showing psammoma body like micro-calcification in tumor (Hematoxylin and Eosin, x200). (d) Photomicrograph showing nuclear Ki67 labeling in the tumor cells (Ki67 immunostain, x400).
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F1
On contrast administration, there was variegated contrast enhancement, with well delineation of cystic regions within the tumor [Figure 1a and b]. Overall features were suggestive of oligodendroglioma [Figure 1c]. Nuclear Ki67 labeling in the tumor cells was positive [Figure 1d].