Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
Coagulative necrosis |
-most common, occurs in solid organs -eg.heart, kidney, spleen, liver |
|
|
Colliquative ( liquefacive) necrosis |
-occurs in the brain due to autolysis progressing almost to completion with little coagulation ischaemia = autolysis of cells ( cerebral infacrt) - occurs in suppuration due to neutrophils lysing pyogenis bacteria and tissue -eg. heterolysis of cells ( abscess - pimple) |
|
|
Caseous necrosis |
-occurs in tuberculosis -due to hypersensitivity reaction and nature of the bacterium -eg.caseous necrosis of lung/spine |
|
|
Heamorrhagic necrosis |
-result of ischemia leading to necrotic tissue infiltrated with extravasated red blood cells -blockage venous drainage of the organ = pooling of bllod is organ ( don't want blood in tossue spaces) = recruitment of white blood cells to combat influx of red -eg. lung infarct of torsion of the testis |
|
|
Gummatous necrosis |
-due to infection with treponema pallidium -firm, rubbery lesions -ring of inflammatory cells |
|
|
Fat necrosis |
-enzymatic type = occurs only around the pancreas = only occurs around organs that originate from fat -traumatic type = occurs when adipose tissue is any site is injured by trauma eg. injury to breast tissue following car accident |
|
|
Fibrinoid necrosis |
-occurs in connective tissue, blood vessel walls in hypertension and autoimmune diseases -collagen degenerates, resembles fibrin |
|
|
Gangrenous necrosis |
-dark, discolored, foul smelling tissue -result of ischamia and infection of necrotic tissue with anaerobic bacteria ( releases gas = gross) |
