Small vessel fibrous necrosis

Small vessel fibrous necrosis is common in fibrinous inflammation. Cellulitis is mainly fibrinogen exudation, and then forms fibrin, that is, cellulose. In HE sections, cellulose was red-stained, reticulated, striped, or granular, often mixed with neutrophil and necrotic cell debris. Necrosis is the death of local tissue cells in vivo, characterized by changes in enzyme solubility. Necrosis can be directly caused by strong pathogenic factors, but most of them develop from reversible damage, and their basic manifestations are cell swelling, organelle disintegration and protein degeneration.