Is choice an illusion? What next for this nine year old girl?

This nine year old was investigated for 3 months history of defective vision and progressive headache and vomiting. She has primary optic atrophy in right eye [no PL]. She underwent a right ventriculoperitoneal shunt procedure in emergency setting for raised intracranial tension. She does well in school and has intact higher intellectual functions.



The preoperative scans are in the video. Pause the video to make your preoperative diagnoses. What might be the two most likely diagnoses?
Un-pause to see the post operative scans and suggest the next steps. What do you think are the treatment choices?

1)Imaging follow up, and if there is progression consider radiotherapy/Re-excision (which one?)
2)Radiotherapy now and re-excision if progression
3)Chemotherapy?
4)Re-excision now

For those of who with limited bandwidth, get a better connection to see the video! [just kidding... please see the attached jpegs: preop and post op]