Q.All are
true regarding “empty sella turcica” except
a.
severely flattened pituitary gland
b. the
superior portion of the sella turcica filled with CSF
c. the diaphragma
sella thin
d.
enlargement of the sella turcica
e.abnormally
positioned stalk
ANS ---e
It is the deficiency of the
diaphragma that is the primary defect in “empty sella turcica”. This allows the suprasellar cistern to herniate into the
sella, exposing it to CSF pulsation and eventually resulting in enlargement of
the sella turcica.
The only differential diagnosis is
that of an arachnoid cyst occupying the superior portion of the sella turcica.
It is important to determine the position of the pituitary stalk to distinguish
these entities. In the empty sella, the stalk is normal in position, whereas
space-occupying cysts cause it to be obliterated or displaced
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