Title: Pediatric ultrasound and appendicitis (submitted by Katherine Baugher, DO) - part 1<br/>Author: Mimi Lu<br/><a href='http://umem.org/profiles/faculty/185/'>[Click to email author]</a><hr/><p>
An overweight 5 year old male presents with acute onset abdominal pain that localizes to the right lower quadrant. What are some causes of a limited or nondiagnostic ultrasound study in children?</p>
<p>
Acute appendicitis is a time sensitive diagnosis. Ultrasound is frequently used as the initial diagnostic imaging in children. There are several reasons why the appendix may not be visualized, including retro-cecal location, normal appendix, perforation, and inflammation around the distal tip. An additional clinical predictor associated with poor or inconclusive ultrasound results in appendicitis is increased BMI (body mass index).</p>
<p>
A study examining 263 pediatric patients found when BMI > 85th percentile and clinical probability of appendicitis was <50%, 58% of ultrasounds were nondiagnostic. Children with a BMI <85th percentile and clinical probability of appendicitis was <50%, had nondiagonstic scans 42% of the time. These trends were also mimicked in the patients with a higher clinical probability of appendicitis. In the child with a nondiagnostic ultrasound, options include observation and repeat ultrasound scan or CT scan, both of which have associated risks.</p>
<p>
</p>
<div>
<span style="font-size:11px;"><u>Reference</u>:</span></div>
<div>
<span style="font-size:11px;">Schuh S, et al. Predictors of non-diagnostic ultrasound scanning in children with suspected appendicitis. J Pediatr. 2011 Jan;158(1):112-8.</span></div>