Adamantinomatous craniopharyngioma
Adamantinomatous craniopharyngiomas typically involve the sella and suprasellar space. Some craniopharyingiomas can be both intrasellar and suprasellar, having a "snowman" appearance.
Description of MRI findings:
- cystic area which is hyperintense on T2-weighted and fluid-attenuated inversion recovery (FLAIR) images with heterogeneous isointense to hypointense solid components in the caudal part.
- signal intensity varies on T1-weighted images. The cystic contents can appear hyperintense if they have a high protein, blood product, and/or cholesterol content. In this case the cystic component is T1-isointense.
- contrast enhancement is seen, which is characteristic.
- compression of the third ventricle may occur and hydrocephalus may be present. Such compression helps in distinguishing craniopharyngioma from Rathke's cleft cyst or pituitary adenoma.
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