Acute inflammation

 Acute amnion inflammation

0.72

0.52

 Acute choriodecidual inflammation

0.86

0.74

 Marginating pattern of acute inflammation

0.71

0.50

 Acute chorionitis

0.87

0.76

 Acute chorionic vasculitis

0.72

0.27

0.59

 Acute umbilical vasculitis

0.72

0.52

 Eosinophilia in fetal inflammatory infiltrates

0.53

0.53

0.56

Uteroplacental vascular pathology

 Uteroplacental vessel fibrinoid necrosis/atherosis

0.49

0.24

 Uteroplacental vessel—absence of physiologic conversion

0.00

 Uteroplacental vessel—persistence of endovascular trophoblast

0.00

 Decidual hemosiderin

0.23

0.05

Placental lesions related to uteroplacental vascular pathology

 Histology related to abruption

0.6

0.21

0.40

 Villous infarct

0.48

0.23

0.26

0.28

0.43

 Syncytiotrophoblast knotting

0.46

0.27

0.28

 Cytotrophoblast (“X-cell”) proliferation

0.36

0.37

0.28

0.32

0.45

 Villous fibrosis

0.69

0.21

0.52

 Villous hypovascularity

0.77

0.59

 Circulating nucleated erythrocytes

0.28

0.21

0.12

Chronic inflammation

 Chronic uteroplacental vasculitis

0.36

0.13

 Decidual eosinophilia

0.00

 Basal plate plasma cell infiltrates

0.41

0.17

 Chronic basal plate inflammation

0.78

0.61

 Villitis of anchoring villi

0.62

0.38

 Chronic intervillositis

0.61

0.37

 Chronic villitis

0.21

0.47

0.27

 Chronic chorionitis/amnionitis

0.63

0.40

Coagulation-related lesions

 Uteroplacental vessel thrombosis

0.79

0.62

 Intervillous thrombus

0.47

0.22

 Perivillous fibrin deposition

0.94

0.88

 Intervillous thrombus with peripheral infarct

0.9

0.2

0.85

 Villous stromal mineralization

0.72

0.33

0.63

 Chorionic vessel thrombus

0.25

0.26

0.47

0.35

 Fetal stem vessel thrombus

0.61

0.37

 Hemorrhagic endovasculitis

0.69

0.48

 Avascular terminal villi

0.8

0.64

Miscellaneous (unclassified) lesions

 Basal plate myometrial fibers

0.00

 Laminar chorionic necrosis

0.22

0.05

 Placental “growth zones” evident

 Villous hypervascularity

0.21

0.23

0.10

 Villous edema

0.27

0.07

 Villous stromal hemorrhage

0.67

0.45

 Villous microcalcification

0.66

0.44