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Padlock Sign

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Padlock Sign
A rare CT finding in which a mass density is accompanied by adjacent ring enhancement, representing eccentric cavitation in a solid intracranial lesion; while characteristic of higher grade astrocytomas, abscesses, and metastases, it is also seen in craniopharyngioma, meningioma, prolactinoma—with cystic changes—and tuberculosis, and thus has little diagnostic specificity


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A closed padlock sign at the bottom of the screen may also indicate a secure site for online shopping and other transactions.
In the address bar at the top of the screen (which starts "http://"), always look for the letter "s" - as in https:// - which indicates the site is secure, as does a padlock sign in the corner of your browser window.
You can also check that you are on a secure website by ensuring there is a padlock sign in the bottom bar on your screen.
 
 
 
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