Breast within a breast sign

The breast within a breast sign refers to the common mammographic appearance of breast hamartomas (fibroadenolipomas). Since these benign lesions are well-circumscribed and contain a mixture of fibrous, glandular and fatty tissue (just like normal breast), it is not surprising that they appear very much like a second breast sitting within a breast.   

Breast imaging and pathology

Article information

rID: 18036
System: Breast
Section: Signs
Synonyms or Alternate Spellings:
  • Breast within breast sign

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Cases and figures

  •  Case 1
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  •  Case 2
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  • Case 3
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  • Case 4
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  • Case 5: unilateral nephrogram - obstructive uropathy
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  • Case 6
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