Cogwheel sign in pelvic imaging

The Cogwheel sign in pelvic imaging refers to an imaging appearance of thickening loops of the Fallopian tube seen on cross section. There are infolding projections (sometimes look like nodules)  into the Fallopian tube lumen which is likened to that of a cogwheel. The sign is typically described on ultrasound and is indicative of tubal inflammation in pelvic inflammatory disease with a pyosalpinx or a hydrosalpinx.

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Article information

rID: 23365
System: Gynaecology
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:
  • Cogwheel sign in pelvic ultrasound
  • Cogwheel sign - pelvic ultrasound
  • Cogwheel sign - hydrosalpinx

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