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
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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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