Fibrinoid necrosis
（重定向自Fibrinoid）
![Micrograph showing (intensely pink) fibrinoid necrosis (large blood vessel - right of image) in a case of vasculitis (Churg-Strauss syndrome). H&E stain.](/Images/godic/202501/13/Churg-Strauss_syndrome_-_high_mag4352.jpg")
Fibrinoid necrosis is a form of necrosis, or tissue death, in which there is accumulation of amorphous, basic, proteinaceous material in the tissue matrix with a staining pattern reminiscent of fibrin. It is associated with conditions such as immune vasculitis (e.g. Polyarteritis nodosa), malignant hypertension, preeclampsia, or hyperacute transplant rejection.