Maternal vascular malperfusion |
1. Retroplacental
hematoma/hemorrhage |
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2. Focal, multifocal, or diffuse parenchymal
infarction |
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3. Intraparenchymal thrombus |
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4. Accelerated villous maturity |
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5. Terminal villous hypoplasia (diffuse) |
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6. Increased syncytial knots (Tenney-Parker
changes) |
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7. Decidual vasculopathy |
Fetal vascular malperfusion |
1. Marginal insertion of umbilical
cord |
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2. Velamentous insertion of umbilical cord |
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3. Furcate insertion of umbilical cord |
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4. Single umbilical artery |
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5. True knot (one or more) |
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6. Increased cord coiling (>3 coils/10
cm) |
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7. Decreased cord coiling (≤ 3 coils/10 cm) |
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8. Avascular villi, focal, multifocal, or diffuse |
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9. Villi with stromal-vascular karyorrhexis |
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10. Chorangiomas |
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11. Chorangiomatosis |
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12. Chorangiosis |
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13. Edema (hydrops) |
Inflammatory lesions involving maternal compartment |
1. Acute
chorioamnionitis, placental membranes |
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2. Acute chorioamnionitis, chronic plate |
Inflammatory lesions involving fetal compartment |
1. Umbilical
cord acute arteritis (1 vessels) |
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2. Umbilical cord acute arteritis (≥2 vessels) |
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3. Umbilical cord acute phlebitis present |
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4. Umbilical cord acute vasculitis (all vessels)
present |
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5. Acute funisitis present |
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6. Chorionic plate acute vasculitis |
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7. Villitis |
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8. Acute villitis |
Immune/Idiopathic
|
Perivillous fibrin deposition
Intervillous fibrin deposition
Chronic intervillositis
|