Assertion: appendicitis's appendix | /r/HasProperty | an appendicolith
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text: Diagnostic criteria include: appendiceal diameter >6 mm, a target sign with 5 concentric layers, distention or obstruction of the appendiceal lumen, high echogenicity surrounding the appendix, an appendicolith, fluid surrounding the appendix, enlarged and thickened bowel wall and lack of peristalsis.24 Sensitivity of US ranges from 71% to 92% and specificity from 96% to 98%.38–41 Patient characteristics that limit US utility include obesity and gaseous distention of bowel