The patient went on to have transphenoidal surgery. 

Histology

The sections show a cyst lined by a combination of ciliated columnar epithelial cells containing goblet cells and squamous epithelial cells.  Separate from the cyst is a solid arrangement of mature squamous epithelium surrounding fibrovascular cores.  No mitotic figures or areas of necrosis are identified.  The features are of papillary craniopharyngioma.

Final diagnosis: Papillary craniopharyngioma

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