CJEM
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Abdominal ultrasound is used for diagnosing appendicitis in patients with right lower quadrant abdominal pain. Between 45 and 82% of radiology performed ultrasounds are indeterminate for appendicitis and computed tomography is required for diagnostic confirmation. Our study aims to determine predictors to rule out appendicitis when ultrasound is indeterminate. ⋯ For patients suspected of appendicitis and indeterminate ultrasound, the absence of an elevated neutrophil count and secondary signs of inflammation are associated with a low probability of appendicitis.