P.090 Third ventricular pituicytoma: case report and review of the literature

Background: Pituicytoma is a rare, low grade tumour typically of the sellar region. Here we present a pituicytoma located in the third ventricle. Methods: 56 year old female presented with amenorrhea, hyperprolactinemia, and progressive bitemporal hemianopsia. MRI revealed a suprasellar mass located within the third ventricle and appearing separate from the pituitary. A supraciliary and translamina terminalis surgical approach to tumour resection was completed without complication. Post-operatively, she developed transient DI which resolved by post-opertaive day 3 and she was discharged hoem without any neurological deficits. Pathology revealed pituicytoma, WHO grade I. Results: Pituicytomas are rare tumours arising from neuroepithelial cells of the pituitary. The majority of cases are pure sellar or sellar with suprasellar extension, or at least have some connection to the pituitary. In many cases, imaging findings are synonymous to pituitary adenomas. We present a unique case in which the tumour was suprasellar but appeared separate from the pituitary. Surgical intervention is the most highly predictive factor of recurrence, as gross totoal reseciton can be curable. Conclusions: Here we present a unique location of pituictyoma. Due to the exceedingly rare nature of pituicytoma, unique presentations and management help to provide better understanding of the breadth of this disease presentation.