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Keyhole sign (intracapsular breast implant rupture)

The keyhole or noose sign indicates an uncollapsed intracapsular breast implant rupture seen as the focal invagination of the implant shell caused by a small concealed leak of silicone outside shell where the two membranes do not contact each other. It is best appreciated by MRI.

Differential diagnosis

Breast imaging and pathology

Article information

rID: 61213
System: Breast
Section: Signs
Synonyms or Alternate Spellings:
  • Noose sign

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Cases and figures

  • Photograph: keyhole
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