Simple diagrams for all types of necrosis and apoptosis

Reading File

Finding Sources

Searching PubMed

necrosis AND apoptosis

Searching the Web

necrosis patterns apoptosis pathology educational resource

Generating Image

A clean, simple labeled medical pathology infographic for students, organized into two panels. Panel 1 title: Types of necrosis. Show six small schematic diagrams with clear labels: coagulative necrosis (preserved tissue outlines with pale dead cells), liquefactive necrosis (liquid cavity with pus-like debris), caseous necrosis (crumbly cheese-like central material in a granuloma), fat necrosis (adipocytes with chalky calcium soap deposits), fibrinoid necrosis (blood vessel wall with bright fibrin-like deposit), and gangrenous necrosis (dry black toe and wet infected swollen foot shown as simple icon illustrations). Panel 2 title: Apoptosis. Show a cell progressing through shrinkage, chromatin condensation, membrane blebs, apoptotic bodies, then phagocyte clearance; include two small pathway arrows: intrinsic mitochondrial pathway and extrinsic death-receptor pathway, both converge on caspases. Use short labels, clear arrows, no dense paragraphs, medically accurate but easy to copy into notes.

Reading File

Reading Web Page

https://www.ncbi.nlm.nih.gov/books/NBK557627

Types of necrosis

Simple diagrams of necrosis types and apoptosis

Type	Simple visual cue	Typical example
Coagulative	Dead tissue architecture remains as a firm “ghost outline”	Ischemic infarct in solid organs, such as heart or kidney, except brain
Liquefactive	Enzymatic digestion turns tissue into a liquid or pus-filled cavity	Brain infarct; bacterial abscess
Caseous	Amorphous, crumbly “cheese-like” central material within a granuloma	Tuberculosis
Fat	Damaged fat cells plus chalky calcium deposits, called saponification	Acute pancreatitis; traumatic fat injury
Fibrinoid	Bright fibrin-like material deposited in a damaged vessel wall	Immune-mediated vasculitis; severe hypertension
Gangrenous	Clinical pattern of limb ischemia: dry, black shriveled tissue, or wet infected swollen tissue	Peripheral arterial disease, diabetes-related limb ischemia

Gangrene is a clinical term, rather than a separate microscopic pattern:

Dry gangrene = ischemic coagulative necrosis
Wet gangrene = ischemia with superimposed bacterial infection, producing liquefaction

These morphology patterns and examples match standard pathology descriptions in NCBI's necrosis review. Robbins describes necrosis and apoptosis as the two principal forms of cell death. Robbins & Kumar Basic Pathology, pp. 4-8.

Apoptosis

Intrinsic pathway                         Extrinsic pathway
DNA damage / growth-factor loss          Fas or TNF death receptor
             ↓                                       ↓
      BAX / BAK activation                       FADD
             ↓                                       ↓
 Cytochrome-c release from mitochondria      Caspase-8
             ↓                                       ↓
        Caspase-9 ───────────────→ Executioner caspases 3, 6, 7
                                             ↓
Cell shrinkage → chromatin condensation → membrane blebs
             → apoptotic bodies → phagocytosis
             → no significant inflammation

Easy contrast diagram

NECROSIS
Cell swelling → membrane rupture → contents spill out → inflammation

APOPTOSIS
Cell shrinkage → membrane blebbing → apoptotic bodies → phagocytosis
                                                    ↓
                                           no inflammation

In apoptosis, the plasma membrane remains intact until apoptotic bodies are removed; in necrosis, membrane rupture releases intracellular material and provokes inflammation. Histology: A Text and Atlas With Correlated Cell and Molecular Biology, p. 276.

This is a shared conversation. Sign in to Orris to start your own chat.