Milk of calcium within a breast cyst

Last revised by Yaïr Glick on 20 Mar 2022

Milk of calcium within a breast cyst is a mammographic feature observed when there is dependent calcium layering within breast cysts. It is typically observed as "tea cup" or "crescent shaped" calcifications on a true lateral (LM or ML) view or occasionally on a MLO view. On a CC view, these calcifications can appear smudged due to being viewed en face. The presence of milk of calcium is in a vast majority of cases, a very reassuring feature for benign breast disease. 

Entities in which this feature could be observed include:

If milk of calcium is superimposed with more pleomorphic microcalcifications (a very rare situation), consider apocrine carcinoma of the breast 1.

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Cases and figures

  • Milk of calcium within breast cysts - lateral view
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