"Rathke's cleft cyst: rarely can cause sellar enlargement if reaches large size 2"
"empty sella syndromeslight globular enlargement of the sella with no erosion, destruction or posterior displacement of dorsum sellae"
"intracranial hypertensionenlargement with erosion of anterior cortex of dorsum sellae proceeds to the floor of the sella and may result in complete destruction of the dorsum; erosion of anterior and posterior clinoids can be seen"
"pituitary tumours (e.g. macroadenoma)ballooned sella with an undercutting anterior clinoid process, unequal downward displacement of the floor (double floor appearance)"