Acute inflammation

 Acute amnion   inflammation

0.85

0.72

 Acute   choriodecidual   inflammation

0.83

0.69

 Marginating pattern   of acute   inflammation

0.63

0.40

 Acute chorionitis

0.82

0.67

 Acute chorionic   vasculitis

0.85

0.72

 Acute umbilical   vasculitis

0.73

0.53

 Eosinophilia in fetal    inflammatory   infiltrates

0.6

0.32

0.46

Uteroplacental vascular pathology

 Uteroplacental   vessel fibrinoid   necrosis/atherosis

0.71

0.50

 Uteroplacental   vessel—absence of   physiologic   conversion

0.69

0.48

 Uteroplacental   vessel—persistence   of endovascular   trophoblast

0.00

 Decidual  hemosiderin

0.00

Placental lesions related to uteroplacental vascular pathology

 Histology related to   abruption

0.63

0.33

0.51

 Villous infarct

0.32

0.67

0.55

 Syncytiotrophoblast   knotting

0.68

0.46

 Cytotrophoblast   (“X-cell”)   proliferation

0.2

0.37

0.21

0.44

0.41

 Villous fibrosis

0.63

0.40

 Villous   hypovascularity

0.72

0.52

  Circulating nucleated   erythrocytes

0.00

Chronic inflammation

 Chronic   uteroplacental   vasculitis

0.38

0.21

0.19

 Decidual   eosinophilia

0.00

 Basal plate plasma   cell infiltrates

0.8

0.64

 Chronic basal plate   inflammation

0.23

0.58

0.58

0.73

 Villitis of anchoring   villi

0.71

0.71

1.01

 Chronic   intervillositis

0.65

0.42

 Chronic villitis

0.59

0.35

 Chronic   chorionitis/amnionitis

0.00

Coagulation-related lesions

 Uteroplacental   vessel thrombosis

0.00

 Intervillous   thrombus

0.35

0.12

 Perivillous fibrin   deposition

0.89

0.79

 Intervillous   thrombus with   peripheral infarct

0.91

0.83

 Villous stromal   mineralization

0.3

0.55

0.39

 Chorionic vessel   thrombus

0.4

0.21

0.20

 Fetal stem vessel   thrombus

0.79

0.62

 Hemorrhagic   endovasculitis

0.61

0.28

0.45

 Avascular terminal   villi

0.65

0.42

Miscellaneous (unclassified) lesions

 Basal plate   myometrial fibers

0.22

0.05

 Laminar chorionic   necrosis

0.3

0.09

 Placental “growth   zones” evident

0.61

0.37

 Villous   hypervascularity

0.00

 Villous edema

0.23

0.43

0.24

 Villous stromal   hemorrhage

0.64

0.41

 Villous   microcalcification

0.69

0.3

0.34

0.26

0.75