Indian J Med Microbiol Close
 

Figure 6: Patient 11. (a) T1 contrast axial and (b) sagittal MR showing heterogeneous contrast enhancement in a large lobulated lesion in right thalamus and medial wall of trigonal region of lateral ventricle reaching to posterior third ventricular region. Pineal gland is seen separately from lesion. There is midline shift toward left. (c) H and E stained sections (×400) showing diffuse infiltration by sheets of atypical round cells which are small to medium sized having enlarged hyperchromatic nuclei with nuclear membrane irregularity, coarse chromatin, inconspicuous nucleoli and scant amount of cytoplasm. Increased mitotic figures and apoptotic bodies are also noted. The findings are suggestive of a primitive neuroectodermal tumor

Figure 6: Patient 11. (a) T1 contrast axial and (b) sagittal MR showing heterogeneous contrast enhancement in a large lobulated lesion in right thalamus and medial wall of trigonal region of lateral ventricle reaching to posterior third ventricular region. Pineal gland is seen separately from lesion. There is midline shift toward left. (c) H and E stained sections (×400) showing diffuse infiltration by sheets of atypical round cells which are small to medium sized having enlarged hyperchromatic nuclei with nuclear membrane irregularity, coarse chromatin, inconspicuous nucleoli and scant amount of cytoplasm. Increased mitotic figures and apoptotic bodies are also noted. The findings are suggestive of a <i>primitive neuroectodermal tumor</i>