Forbidden areas in mammography

In breast imaging, forbidden, check or review areas are zones that, according to Tabár, requires special attention in mammographic interpretation. 

These are:

  • on a MLO view
    • the "milky way" (retromammary fat): a 3-4cm wide band parallel to edge of pectoral muscle
    • retroareolar space
  • on a CC view
    • the medial half of the breast 
    • "No man's land" is the retroglandular clear space beteween the posterior border of the breast parenchuma and the chest wall on any view, however especially on CC view.

The definition "forbidden areas" is based on the incidence and distribution of cancer or interval cancers identified in screening with clusters in the tail and inframammary fold on the MLO view, and in the tail, centrally and in the medial portions of the breast on CC view. This implies the need for neutral radiographic position (no medial or lateral rotation). 

Breast imaging and pathology
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Article information

rID: 15344
System: Breast
Section: Approach
Synonyms or Alternate Spellings:
  • Forbidden areas
  • Forbidden areas in a mammogram
  • Check areas in a mammogram
  • Review areas in a mammogram

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Cases and figures

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    Case 1: lesion in retromammary fat
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    Case 2: retroareolar cancer
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