In addition, MRI and CT scans can show ring enhancement or halo around a partially or completely empty sella turcica, called the 'pituitary ring sign'.

此外，MRI和CT扫描可显示部分或全空的蝶鞍附近出现环形强化或光晕，称为“垂体环征”。

In severe cases, severe destruction and scarring can lead to an empty sella turcica which is when the pituitary gland shrinks and flattens into the skull.

更有甚者，严重的破坏和瘢痕会导致出现空蝶鞍；蝶鞍是垂体通常所在的位置。