====== Capsule ======

A sac of tissue and blood vessels that surrounds an organ, joint, or tumor. A capsule is also a form used for medicine that is taken by mouth. It usually has a shell made of gelatin with the medicine inside. 

[[Brain abscess]]es are suppurative [[infection]]s of the [[brain parenchyma]] surrounded by a vascularized [[capsule]]. 
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[[Tumor capsule]]