Table 2. Pulmonary pathologic findings of patients who died from COVID-19.

ARDS: acute respiratory distress syndrome; COVID-19: coronavirus disease 2019; DAD: diffuse alveolar damage; NI: not identified.

Lung pathologic findings	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5	Patient 6	Patient 7
Interstitial/alveolar edema	No lung tissue	NI	Present	NI	NI	No lung tissue	NI
Capillary microthrombi	-	Present	NI	Present	NI	-	NI
Desquamation	-	Present	Present	Present	Present	-	Present
Hyaline membrane formation	-	Present	Present	Present	Present	-	NI
Hyaline membrane organization	-	NI	NI	Present	NI	-	NI
Type II pneumocyte proliferation	-	Present	Present	NI	Present	-	Present
Cytopathic effect	-	Present	Present	NI	NI	-	NI
Interstitial cell increase	-	Present	Present	Present	Present	-	Minimal
Septal collagen increase	-	NI	NI	NI	NI	-	Present
Septal thickening	-	Present	Present	Present	Present	-	Present
Mononuclear cell increase	-	Minimal	Present	NI	Minimal	-	NI
Pathologic diagnosis	-	DAD (epithelial and vascular)	DAD (epithelial)	DAD (epithelial and vascular)	DAD (epithelial)	-	DAD (vascular and fibrotic)