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  #1  
Old 12-13-2010
dr z's Avatar
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Neuro Supratentorial/Infratentorial

Can anyone explain why?
Pituitary adenoma is Infratentorial in adult tumors
but
Craniopharyngioma is Supratentorial in childhood tumors
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  #2  
Old 12-14-2010
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Question no answer

oh i c , everyone has the same confusion
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Old 12-15-2010
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That is confusing... but my best guess is from wikipedia:

If originating superior to the optic chiasm, more commonly in a craniopharyngioma of the pituitary stalk, the visual field defect will first appear as bitemporal inferior quadrantanopia, if originating inferior to the optic chiasm the visual field defect will first appear as bitemporal superior quadrantanopia.

This implies to me that craniopharyngiomas arise for the stalk so they are supratentorial and other pituitary adenomas arise from the glandular tissue itself so they are infratentorial. Make sense?
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  #4  
Old 12-15-2010
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Yes absolutely it makes sense

Craniopharygioma (if from stalk,) then they r more close to Post pitutary leading to ADH deficiency : DI

Pitutary adenoma on the other hand causes hypo/hyperpitutarism initially of Anterior pitutary : hyperprlectinemia , GH def etc
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