From: Placental pathology of the third trimester pregnant women from COVID-19
Pathological diagnosis | patient | |||||||
---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
Category I: Maternal vascular malperfusion | ||||||||
Central placental infarct(s) | √ | |||||||
Peripheral placental infarct | √ | |||||||
Distal villous hypoplasia | √ | |||||||
Accelerated villous maturation pattern | ||||||||
Increased syncytial knots | √ | √ | √ | √ | √ | √ | √ | √ |
Villous agglutination | ||||||||
Category II:maternal decidual arteriopathy | ||||||||
Insufficient vessel remodelling | ||||||||
Fibrinoid necrosis | ||||||||
Category III:Fetal vascular malperfusion (FVM) | ||||||||
Avascular fibrotic villi | ||||||||
Thrombosis | ||||||||
Intramural fibrin deposition | ||||||||
Villous stromal-vascular karyorrhexis | ||||||||
Stem villous vascular obliteration | ||||||||
High-grade fetal vascular malperfusion | ||||||||
Category IV:Ascending intrauterine infection | ||||||||
Maternal inflammatory response (mild) | √ | √ | ||||||
Fetal inflammatory response | ||||||||
Category V:Fibrinoid | ||||||||
Increased focal perivillous fibrin depositions (perivillous fibrin plaque) | √ | √ | √ | √ | √ | √ | √ | |
Massive perivillous fibrin deposition pattern | √ | |||||||
Maternal floor infarct pattern | ||||||||
Category VI:Chronic inflammation | ||||||||
Chronic intervillositis | ||||||||
Chronic plasma cell deciduitis | √ | √ | ||||||
Chronic chorioamnionitis | ||||||||
Category VII:Other placental findngs | ||||||||
Microscopic accreta | ||||||||
Villous edema | √ | |||||||
Membranes with hemorrhage | ||||||||
Acute intervillositis (mild) | √ |