Indian J Med Microbiol Close
 

Figure 7: Patient 12. (a) T1 sagittal, (b) T2 axial and (c) T2 coronal MR showing T1 hypointense, T2 hyperintense, multiseptate lesion in third ventricle, extending from pineal region to foramen of Monro arising from midbrain and pons. (d and e) T1 axial postoperative images showing tumor excision. (f) H and E stained sections (×200) showing the tumor composed of oval to elongated nuclei with fine chromatin, inconspicuous nucleoli and moderate amount of thin piloid cytoplasm with bipolar processes lying in a fibrillary matrix. Occasional hyaline globules and Rosenthal's fibers are also seen. The findings are suggestive of a pilocytic astrocytoma

Figure 7: Patient 12. (a) T1 sagittal, (b) T2 axial and (c) T2 coronal MR showing T1 hypointense, T2 hyperintense, multiseptate lesion in third ventricle, extending from pineal region to foramen of Monro arising from midbrain and pons. (d and e) T1 axial postoperative images showing tumor excision. (f) H and E stained sections (×200) showing the tumor composed of oval to elongated nuclei with fine chromatin, inconspicuous nucleoli and moderate amount of thin piloid cytoplasm with bipolar processes lying in a fibrillary matrix. Occasional hyaline globules and Rosenthal's fibers are also seen. The findings are suggestive of a <i>pilocytic astrocytoma</i>