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*Look for the appendix: A high frequency probe is preferable in children. The external iliac vessels are helpful in initial orientation, as the appendix is often located in their vicinity. If found:
:*Evaluate without and with '''compression'''.:*If possible, follow it from end to end for '''complete ''' evaluation.*Evaluate '''lymph nodes''', mainly along the iliac vessels and aorta*Look for '''ascites ''' at least in the recto-uterine or recto-vesical pouch.
===Findings indicating appendicitis===
[[File:UOTW 45 - Ultrasound of the Week 3.jpg|thumb|Ultrasound showing appendicitis and an appendicolith<ref name=UOTW45>{{cite web|title=UOTW #45 - Ultrasound of the Week|url=https://www.ultrasoundoftheweek.com/uotw-45/|website=Ultrasound of the Week|date=25 April 2015|deadurl=no|archiveurl=https://web.archive.org/web/20170509131322/https://www.ultrasoundoftheweek.com/uotw-45/|archivedate=9 May 2017|df=}}</ref>]]
*Absence of '''compressibility'''<ref name=radiopaedia>{{cite web|url=https://radiopaedia.org/articles/appendicitis|title=Appendicitis|author=Dan J Bell and Koshy Jacob|website=Radiopaedia|accessdate=2018-06-25}}</ref>*'''Dilatation ''' >6 mm in outer diameter<ref name=radiopaedia/>*'''Appendicolith'''<ref name=radiopaedia/>*Distinct '''wall layers'''<ref name=radiopaedia/>*Hyperechoic and prominent periappendiceal and '''pericecal fat'''<ref name=radiopaedia/>*Periappendiceal '''fluid'''<ref name=radiopaedia/>*'''Target sign'''<ref name=radiopaedia/>*Periappendiceal '''lymphadenopathy'''<ref name=radiopaedia/>
===If appendix is normal===
Consider performing:
*Right-sided [[ultrasonography of hydronephrosis|ultrasonography of '''hydronephrosis''']]*[[Ultrasonography of cholecystitis|Ultrasonography of '''cholecystitis''']]
==Report==
