Ectopic posterior pitutiary
Short stature. Hypogonad low growth hormone.
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The pituitary fossa is small and shallow with a small amount of enhancing tissue along its floor though to be hypoplastic anterior pituitary, and absent posterior pituitary bright spot. There is a small nodule of soft tissue at the third ventricular floor inferior to the optic recess; given mild intrinsic T1 hyperintensity this is consistent with ectopic posterior pituitary. The pituitary stalk is absent. The remainder of the imaged brain (please note this study has been targeted to the pituitary, and as such the whole brain has not been imaged) appears unremarkable.
Conclusion: Findings consistent with congenital interruption of the pituitary stalk syndrome with ectopic posterior pituitary.
A nice example of an ectopic posterior pituitary.
Case courtesy of Dr Christine Goh, Royal Melbourne Hospital.