Supplementary Table 1.

Results in Patients With Ultrasonography or Cross-Sectional Abdominal Imaging

Patient	Modality	Normal	Result
1	CT	Yes	Normal-appearing bowel No inflammatory stranding or secondary signs suggestive of appendicitis Diffuse ground-glass opacities and septal thickening in the lung bases Nodular airspace opacities in the posterior dependent lobes may represent atelectasis or pneumonia
2	MRI	No	Severe concentric mural thickening, edema, and hyperenhancement of a short segment of terminal ileum with extensive mesenteric fat edema, as well as similar mural thickening in the rectosigmoid colon Ascites
3	MRI	No	Scant pelvic ascites Normal gastrointestinal tract
4	US	No	Right lower quadrant lymphadenopathy suggestive of mesenteric adenitis
5	US	No	Ascites, thick-walled gall bladder without cholecystitis
6	US	No	Sludge in gallbladder
7	US	No	Thickened bowel loops in the right lower quadrant, a prominent appendix, thickened gallbladder wall
8	US	No	Gallbladder wall thickening and pericholecystic fluid concerning for acalculous cholecystitis, small amount of free fluid
9	US	No	Nonspecific, course heterogeneous parenchymal echogenicity of the liver without focal lesions, not seen on prior US
10	US	No	Nonspecific mild bowel wall thickening in pelvis, gallbladder distended and filled with sludge, trace pelvic free fluid
11	US	No	Hepatomegaly, normal echogenicity, patent vasculature
12	US	Yes	Normal
13	US	No	Right lower quadrant mesenteric adenitis
14	US	Yes	Normal
15	US	No	Small ascites, gallbladder sludge, homogenous liver, patent hepatic vasculature

CT, computed tomography; MRI, magnetic resonance imaging; US, ultrasonography.