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Craniopharyngioma


A brain tumour derived from remnants of Rathke’s pouch, an embryologic structure from which the pituitary gland is partly formed.  The patient may show raised intracranial pressure and diabetes insipidus due to reduced secretion of the hormone vaso-pressin.  An X-ray of the skull typically shows calcification within the tumour and loss of the normal skull structure around the pituitary gland.