Papillary Vs adamantinomatousCraniopharyngioma

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.