Table 2.

Histologic features of lung tissue in 14 autopsy cases of COVID-19.

Case Number	1	2	3	4	5	6	7	8	9	10	11	12	13	14	N=14*
Symptom onset – death (days)	6	7	10	12	16	17	19	21	21	23	28	30	30	50	20.7
Total no. of slides	20	20	28	16	23	21	12	16	15	23	17	26	20	25	20.1
No. of slides from the lung	11	11	13	8	11	11	6	7	8	9	10	15	5	8	9.5
Pulmonary capillary congestion	+++	+++	+++	+++	++	++	+++	+++	+++	+++	++	+++	++	++	100.0
DAD, acute	+	+	++	+	+	+	+	+	+	+	++	-	+	-	85.7
Pulmonary edema	+	+++	+	+	+	+	+	+	+	++	+	+	+	++	100.0
DAD, organizing	-	++	++	++	+++	+++	++	+++	++	++	+++	+++	++	+	92.9
Pneumocyte hyperplasia	-	+	++	+	+++	++	++	+++	++	+	+++	++	++	+	92.9
Multinucleated cells	-	-	+	+	+++	++	++	++	+	+	++	++	+	+	85.7
Squamous metaplasia	-	+	++	++	+	+	+	+	+	+	+++	++	+	-	85.7
Acute bronchopneumonia	+++	+++	-	+++	+++	++	-	+	++	++	++	++	+	-	78.6
Pulmonary hemorrhage	+++	++	+	+	+++	++	+	+	+	+	+	+++	+	++	100.0
Infarct	-	-	-	-	+	-	-	-	-	-	+	-	-	-	14.3
Pulmonary microthrombi	-	+	+	-	+	+	-	+	+	+	+	+	+	+	78.6
Thrombi in mid-sized pulmonary arteries	-	+	-	-	+	+	-	-	-	-	+	-	-	+	35.7
Special stains	+	+	-	+	-	+	-	-	-	+	+	+	-	-	50.0

+, mild; ++, moderate; +++, marked; - not present. *Categorical variables are expressed as percentages, numerical variables are expressed as means.