Table 4. Recurrent pathologic findings by organ/organ-system.

Organ/system	Organ Specific	Microthrombi	Endothelial Injury	TE disease	Vasculitis	Inflammation*	H/D compromise
	n (%)	n (%)	n (%)	n (%)	n (%)	n (%)	n (%)
Upper airways+	-	-	-	-	-	$33/33\left(100\right)$	-
Lung	$\mathrm{DAD}\mathrm{*}315/342\left(92.1\right)$	132 (38.6)	61 (17.8)	47 (13.7)	10 (2.9)	21 (6.1) **	27 (7.9)
GI	-	2/83 (2.4)	2 (2.4)	-	-	-	$15\left(18.1\right)$
Liver	-	-	1/236 (.4)	93 (39.4)	-	59 (25.0)	$114\left(48.3\right)$
Heart	-	-	8/210 (3.8)	$45\left(21.4\right)$	-	37 (17.6)	-
Kidney	-	55/276 (19.9)	1 (0.4)	2 (0.7)	-	-	$147\left(53.3\right)$
CNS	-	20/110 (18.2)	-	9 (8.2)	-	9 (8.2)	$34\left(30.9\right)$
Hem-Lymph	-	-	-	1/136 (0.7)	-	$15\left(11.0\right)$	7 (5.2)
Skin	-	13/44 (29.5)	1 (2.3)	-	11 (25.0)	$15\left(34.1\right)$	-
Placenta	-	$11/19\left(57.9\right)$	-	-	-	1 (5.3)	-

GI- gastrointestinal, CNS- central nervous system, Hem-lymph- hematolymphoid, DAD- Diffuse alveolar damage, TE- thromboembolic, H/D-hemodynamic. +Trachea, pharynx, bronchial, mucosa.

* Possible cytopathic effect.

** Inflammation not related to Diffuse Alveolar Damage. Highlighted- most common abnormality by organ-system.