Herniation of the optic chiasm and third ventricle into a partial empty sella
Known history of pituitary prolactinoma a few years ago. Treated conservatively with dopamine agonists. Lost clinical follow-up, presenting now with visual impairment.
MRI Pituitary gland
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There is a prominent enlarged sella, which is partially empty, and has an associated downward herniation of the floor of the third ventricle, optic chiasm and proximal segments of the anterior cerebral arteries within. The pituitary gland shows to be relatively enlarged and displaced peripherally against the sellar walls.
The remainder of the brain is unremarkable.
Herniations into the sella have been described associated either with primary or secondary empty sella. Such as in this case, visual disturbances have been well documented associated with secondary empty sella (medical/surgical therapy of a sellar tumour like marcoadenoma).
Unfortunately, previous imaging were not available to make a clear correlation with the tumour (documented macroadenoma).
- 1. Dhanwal DK, Sharma AK. Brain and optic chiasmal herniations into sella after cabergoline therapy of giant prolactinoma. Pituitary. 2011;14 (4): 384-7. doi:10.1007/s11102-009-0179-x - Pubmed citation
- 2. Kaufman B, Tomsak RL, Kaufman BA et-al. Herniation of the suprasellar visual system and third ventricle into empty sellae: morphologic and clinical considerations. AJR Am J Roentgenol. 1989;152 (3): 597-608. doi:10.2214/ajr.152.3.597 - Pubmed citation