Presentation
Isolated growth hormone deficiency.
Patient Data
The precontrast T1 hyperintense signal of the posterior pituitary gland is absent. There is however precontrast T1 hyperintensity at the floor of the third ventricle consistent with ectopic posterior pituitary tissue. The pituitary gland is otherwise normal in size and volume. No discrete mass or abnormal enhancement. Cavernous sinus and paracavernous structures are unremarkable.
The ventricles and sulci are normal in size and configuration. The corpus callosum is intact. The optic chiasm and optic nerves appear within normal limits. No intracranial mass is identified.
The paranasal sinuses and mastoid air cells are clear. Prominent adenoidal soft tissue likely physiological in this age group. No aggressive osseous lesion.
Case Discussion
Ectopic posterior pituitary is often a cause of growth hormone deficiency.
It maybe associated with multiple additional brain abnormalities (not present in our case).
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