Necrosis (plural: necroses) is defined as unregulated cell death. This is in contrast to apoptosis, which is a form of regulated, or programmed, cell death .
Necrosis is the most common type of cell death observed in injury/disease. It occurs when cellular damage is so severe that lysosomal enzymes enter the cytoplasm, causing autodigestion of the cell .
The main types of necrosis are: