Micrograph showing (intensely pink)<unk>  (large blood vessel – right of image) in a case of vasculitis (eosinophilic granulomatosis with polyangiitis). H&E stain.<unk>  is a specific pattern of irreversible, uncontrolled cell death that occurs when antigen-antibody complexes are deposited in the walls of blood vessels along with fibrin. It is common in the immune-mediated vasculitides which are a result of type III hypersensitivity. When stained with hematoxylin and eosin, they appear brightly eosinophilic and smudged.
Fibrinoid necrosis
Coagulative necrosis
Fat necrosis
Liquefactive necrosis
Caseous necrosis
Infibulation
Contraction band necrosis
Fibromatosis