Target sign (intussusception)

Last revised by Magdi Mahsoub on 27 Jan 2025

The target sign of intestinal intussusception, also known as the doughnut sign or bull's eye sign.

The appearance is generated by concentric alternating echogenic and hypoechoic bands. The echogenic bands are formed by the serosa and submucosa either side of the hypoechoic muscularis propria 1.

See also

Cases and figures

  • Figure 1: target photo
  • Case 1
  • Figure 2: doughnut photo
  • Case 2: small bowel intussusception
  •  Case 3
  • Case 4
  • Case 5
  • Case 6
  • Case 7
  • Case 8
  • Case 9: ultrasound
  • Case 9: CT
  • Case 10
  • Case 11
  • Case 12
  • Case 13
  • Case 14: with crescent-in-doughnut sign
:

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.