| Definition | Uncontrolled cell death due to injury or disease. | Programmed cell death, a controlled process for cell elimination. |
| Mechanism | Passive process involving cell injury and swelling. | Active process that involves specific signaling pathways. |
| Cell Size | Cells swell (oncosis) and eventually burst (lysis). | Cells shrink and undergo fragmentation into apoptotic bodies. |
| Morphological Changes | Loss of membrane integrity, organelle swelling, and massive inflammation. | Chromatin condensation, membrane blebbing, and formation of apoptotic bodies. |
| Inflammation | Typically causes inflammation in surrounding tissue. | Generally does not induce inflammation; cells are cleared by phagocytosis without immune response. |
| Triggers | Often triggered by harmful stimuli such as toxins, infections, or trauma. | Triggered by normal physiological processes, such as development, and can also be induced by stress or DNA damage. |
| Types of Cell Death | Includes coagulative, liquefactive, caseous, and gangrenous necrosis among others. | Can be intrinsic (mitochondrial pathway) or extrinsic (death receptor pathway). |
| Clinical Relevance | Associated with various pathological conditions such as heart attacks and infections. | Plays a critical role in development, immune response, and tissue homeostasis. |
| Effect on Organism | Can lead to tissue damage and significant disease. | Maintains cellular balance and homeostasis; often beneficial. |