pituitary adamantinoma

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A suprasellar neoplasm that may be cystic; develops from the nests of epithelium derived from Rathke pouch; the histologic pattern, similar to that observed in adamantinomas, consists of nesting of squamous epithelium bordered by radially arranged cells; frequently accompanied by calcium deposition; may occassionally have a papillary architecture microscopically.
[cranio- + pharyngio- + -oma]
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