A<unk>  contains serous fluid. This is composed of blood plasma that has seeped out of ruptured small blood vessels and the inflammatory fluid produced by injured and dying cells.<unk> s are different from hematomas, which contain red blood cells, and abscesses, which contain pus and result from an infection. Serous fluid is also different from lymph.
Seroma
Stoma 
Encephalitis
Brain abscess
Meninges
Cerebritis
Hematoma
Meningitis