Placental Pathology in COVID-19

Table 3

Diagnoses

	Patient
Diagnosis	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Maternal vascular malperfusion (MVM)
MVM–formal diagnosis		x									x
Central villous infarction								x
Peripheral villous infarction		x			x									x
Villous agglutination								x			x			x
Accelerated villous maturation		x									x
Decidual arteriopathy–any		x	x	x		x	x			x	x
Atherosis and fibrinoid necrosis		x	x								x
Mural hypertrophy of membrane arterioles		x		x			x			x	x
Absence of spiral artery remodeling						x					x
Retroplacental hematoma	x												x
MVM–any individual features	x	x	x	x	x	x	x	x		x	x		x	x
Fetal vascular malperfusion (FVM)
FVM–formal diagnosis		x
FVM–high grade		x
Clustered avascular villi		x			x					x					x
Fetal vessel–mural fibrin			x
Delayed villous maturation		x					x		x					x
Hypercoiled umbilical cord						x									x	x
Chorangiosis				x						x		x				x
FVM–any individual feature		x	x	x	x	x	x		x	x		x		x	x	x
Acute inflammatory pathology (AIP)
Maternal inflammatory response stage 2															x
Fetal inflammatory response stage 2															x
AIP–any features															x
Chronic inflammatory pathology (CIP)
Chronic villitis--low grade											x			x
Chronic deciduitis with plasma cells											x			x
CIP–any features											x			x
Other placental findings
Basal plate with attached myometrial fibers			x					x			x
Microscopic accreta							x								x
Villous edema	x								x	x		x			x
Increased perivillous fibrin				x			x				x
Intervillous thrombus				x	x		x					x		x		x
Increased circulating nucleated RBCs													x
Membranes with hemorrhage							x					x