Acute appendicitis with CT arrowhead sign
RLQ pain and tenderness.
Loading Stack -
0 images remaining
Dilatation of appendix and periappanciceal mesentric fat strandings with an appendicolith in the appendiceal lumen. Mesentric lymphadenopathy is distinguishable in the adjacent mesentric fat.
Inflammation at the base of the appendix produces an 'arrow like' collection of caecal contrast.
Acute appendicitis is one of the commonest causes of an ‘‘acute abdomen’’ and appendicectomy is the commonest emergency surgical operation performed worldwide.
The two diagnostic CT signs of acute appendicitis are unequivocal identiﬁcation of an abnormalappendix, which is usually ﬂuid-ﬁlled with a slightly thickened and circumferentially enhancing wall and dilated more than 6 mmin transverse diameter, or an appendicolith associated
with pericaecal inﬂammatory stranding.
- 1. Pinto leite N, Pereira JM, Cunha R et-al. CT evaluation of appendicitis and its complications: imaging techniques and key diagnostic findings. AJR Am J Roentgenol. 2005;185 (2): 406-17. AJR Am J Roentgenol (full text) - Pubmed citation
- 2. Haaga JR, Boll D. CT and MRI of the whole body. Mosby. (2009) ISBN:0323053750. Read it at Google Books - Find it at Amazon
- 3. See TC, Ng CS, Watson CJ et-al. Appendicitis: spectrum of appearances on helical CT. Br J Radiol. 2002;75 (897): 775-81. Br J Radiol (full text) - Pubmed citation
- 4. Rexroad JT. The CT arrowhead sign. Radiology. 2003;227 (1): 44-5. Radiology (full text) - doi:10.1148/radiol.2271020086 - Pubmed citation