Win an All-Access Pass!
Become a new yearly Curie (Radium) or Roentgen (Gold) Radiopaedia Supporter during December and be in the running to win one of four 12-month All-Access Passes. Find out more.

1-2-3 rule (ovary)

Dr Owen Kang and Assoc Prof Craig Hacking et al.

The 1-2-3 rule is a simple aide-mémoire describing the nomenclature of any small simple anechoic structure in the ovary on ultrasound:

Article information

rID: 66258
System: Gynaecology
Section: Mnemonics
Synonyms or Alternate Spellings:

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1: Polycystic ovaries with multiple follicles
    Drag here to reorder.
  • Case 2: Ovarian cyst
    Drag here to reorder.
  • Updating… Please wait.

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

     Thank you for updating your details.