Target sign (intussusception)

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 hypoechogenic bands. The echogenic bands are formed by mucosa and muscularis whereas the submucosa is responsible fo the hypoechoic bands.

See also

Inspired signs
Share article

Article information

rID: 3906
Section: Signs
Synonyms or Alternate Spellings:
  • Target sign of intussuception
  • Doughnut sign of intussusception
  • Donut sign (intussusception)
  • Bull’s eye sign (intussusception)

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: target photo
    Drag here to reorder.
  • Case 1
    Drag here to reorder.
  • Figure 2: doughnut photo
    Drag here to reorder.
  •  Case 3
    Drag here to reorder.
  • Case 4
    Drag here to reorder.
  • Target sign
    Case 5
    Drag here to reorder.
  • Target sign of In...
    Case 6
    Drag here to reorder.
  • High frequency li...
    Case 7
    Drag here to reorder.
  • Case 8
    Drag here to reorder.
  • Target sign in th...
    Case 9: ultrasound
    Drag here to reorder.
  • Target sign
    Case 9: CT
    Drag here to reorder.
  • Updating… Please wait.

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

     Thank you for updating your details.