Q.All are
true regarding papillary craniopharyngioma except
a. typically
found in the adult
b. solid with
extensive calcification
c. often
found within the third ventricle
c.
encapsulated
d. typically
enhance
ANS.—b
Papillary
lesions are solid with no calcification . In distinction from their
adamantinomatous counterpart, MR shows papillary craniopharyngiomas as solid
lesions. they are often situated within
the third ventricle. These lesions demonstrate a nonspecific signal intensity
pattern, without the characteristic hyperintensity on T1-weighted images of the
cystic component of adamantinomatous tumors. Like all craniopharyngiomas,
papillary lesions typically enhance.
On pathologic examination,
papillary lesions do not show the features characteristic of the
adamantinomatous variant, that is, the cholesterol crystals in a cystic
component, wet keratin nodules, fibroinflammatory tissue, keratin,
calcification, and nuclear palisades. In papillary lesions, there is extensive
squamous differentiation.
