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Patient status post posterior fossa craniectomy, with midline surgical, CSF filled cavity which communicates with the 4th ventricle. No abnormal enhancement or mass is identified in the region of surgery.
The left inferior olivary nucleus is hypertrophied and demonstrates increased T2 signal without abnormal T1 signals, enhancement or restricted diffusion.
Conclusion
- No evidence of recurrent tumour within the surgical cavity.
- Hypertrophic olivary degeneration.