Whirlpool sign (ovarian torsion)

Dr Vikas Shah and Dr Bruno Di Muzio et al.

The whirlpool sign or whirl sign of ovarian torsion is characterized by the appearances of a twisted ovarian pedicle seen on US or even on CT. 


The term whirlpool sign is used in other contexts: see whirlpool sign (disambiguation).

Radiographic features

It appears as twisting of the thickened vascular pedicle of the enlarged ovary. It can be detected on ultrasound confirming the diagnosis along with the other suggestive imaging features and clinical presentation 2. On MRI, it is best demonstrated on axial T2 and T1 C+ fat sat sequences 1.

Article information

rID: 62160
System: Gynaecology
Section: Signs
Synonyms or Alternate Spellings:
  • Whirl sign - ovary
  • Whirl sign - ovarian torsion
  • Whirlpool sign - ovary
  • Whirlpool sign - ovarian torsion

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Cases and figures

  • Figure 1: whirlpool image
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  • Case 1: CT
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  • Case 2: axial T2
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  • Case 3: axial T2
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  • Case 4: axial T1 C+ fat sat
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  • Ovarian torsion

    Case 5: ultrasound
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  • Case 6: coronal T1C+
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  • Case 7: ultrasound cineloop
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