Key points of imaging diagnosis of pituitary dysplasia

Pituitary dysplasia

term

image

Primary differential diagnosis

pathology

Clinical points

Diagnostic compendium

(left) The sagittal bitmap shows the ectopic posterior pituitary lobe (straight arrow) distal to
the shortened pituitary stalk.
Both the sella and the pituitary gland (curved arrow) are small
.

(Right) Sagittal T1WI shows that the posterior lobe of the ectopic pituitary is located in the median ridge (straight arrow).

The pituitary funnel is absent, the anterior lobe of the pituitary (curved arrow) is small, and the posterior lobe
of the bright pituitary is not normal.

(Left) Coronal T1WI shows an ectopic posterior pituitary lobe in the median bulge (straight arrow).

No pituitary stalk
is seen below the posterior lobe of the ectopic pituitary.
Transparent septum is visible, and the optic beam (curved arrow) is of normal
size.

(Right) Axial T1WI C+ confirms that the ectopic posterior lobe of the bright pituitary (straight arrow) is located in the median ridge, at the base of
the funnel stalk.

(Left) Sagittal T1WI shows pituitary (black arrow) shrinkage and loss of
pituitary stalk.
The posterior lobe of the ectopic pituitary (empty arrow) of hyperintensity is located in the median bulge
.
The corpus callosum is morphologically abnormal with characteristic compression (white arrow) reduction
.

(Right) In the same patient, coronary T2WI shows concomitant left ventricular perinodular gray matter ectopy (straight arrow) and lower temporal lobe gray matter dysplasia
.
The right choroidal cleft cyst (curved arrow) is most likely unrelated
to the disease.

(Left) A patient with septal dysplasia with sagittal T1WI showing ectopic posterior bright pituitary (straight arrow).

Pay attention to the narrowing of the optic chiasm (empty arrows) and the lowering of the dome (curved arrows).

(Right) A patient with a bipituitary gland with sagittal T1WI showing thickening of the sellar base, gray nodules and papillary body fusion (nodule-papillary body fusion) (arrow).

Note the disappearance
of the midline sella and pituitary funnel.

(Left) A newborn with a midline basilar cleft with a bipituitary stalk
on coronary T2WI.
The normal-sized pituitary stalk extends below the optic chiasm toward the bipituitary
.

(Right) Coronary T1WI shows two normal-sized pituitary displacement laterally at the abnormal skull base
.
Under the influence of maternal hormones, the pituitary gland is uniformly hyperintensive
.
Normal neonatal pituitary T1WI is diffuse hyperintensity
.

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