Editing Inflammation (section)

== Morphologic patterns ==
Specific patterns of acute and chronic inflammation are seen during particular situations that arise in the body, such as when inflammation occurs on an [[epithelial]] surface, or [[pyogenic]] bacteria are involved.
* '''Granulomatous inflammation:''' Characterised by the formation of [[granuloma]]s, they are the result of a limited but diverse number of diseases, which include among others [[tuberculosis]], [[leprosy]], [[sarcoidosis]], and [[syphilis]].
* '''Fibrinous inflammation:''' Inflammation resulting in a large increase in vascular permeability allows [[fibrin]] to pass through the blood vessels. If an appropriate ''procoagulative'' stimulus is present, such as cancer cells,<ref name="robspath" /> a fibrinous exudate is deposited. This is commonly seen in [[serous membrane|serous cavities]], where the conversion of fibrinous exudate into a scar can occur between serous membranes, limiting their function. The deposit sometimes forms a pseudomembrane sheet. During inflammation of the intestine ([[pseudomembranous colitis]]), pseudomembranous tubes can be formed.
* '''Purulent inflammation:''' Inflammation resulting in large amount of [[pus]], which consists of neutrophils, dead cells, and fluid. Infection by pyogenic bacteria such as [[staphylococci]] is characteristic of this kind of inflammation. Large, localised collections of pus enclosed by surrounding tissues are called [[abscess]]es.
* '''Serous inflammation:''' Characterised by the copious effusion of non-viscous serous fluid, commonly produced by [[mesothelial]] cells of [[serous membrane]]s, but may be derived from blood plasma. Skin [[blister]]s exemplify this pattern of inflammation.
* '''Ulcerative inflammation:''' Inflammation occurring near an epithelium can result in the [[necrotic]] loss of tissue from the surface, exposing lower layers. The subsequent excavation in the epithelium is known as an [[ulcer (dermatology)|ulcer]].