Appendicitis on ultrasound – the first step is to identify the…

Appendicitis on ultrasound – the first step is to identify the appendix (unfortunately not always possible) by finding a blind-ending tubular structure arising from the base of the caecum. The sonographic signs of appendicitis are then as follows:

  • dilated appendix > 6mm outer diameter (left image)
  • noncompressible
  • distinct appendiceal wall layers due to oedema (left image)
  • target appearance (axial section)
  • appendicolith – an echogenic focus with posterior shadowing
  • periappendiceal fluid collection (right image)
  • echogenic and prominent periappendiceal and pericaecal fat
  • surrounding hypervascularity on colour Doppler (centre image)

from our tumblr blog

http://radiologysigns.tumblr.com/

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