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A case report of lactating adenoma of the breast and review of the literatures in Japan


We experienced a rare case of lactating adenoma in the mammary gland of a pregnant woman. A 21-year-old pregnant woman visited our clinic with a chief complaint of left mammary gland tumor. Based on palpation, mammograms and echograms, fibroadenoma or phyllodes tumor was diagnosed and enucleation was performed at the time of biopsy. The histopathological diagnosis was lactating adenoma.

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Estrogen receptor


Progesterone receptor


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Author information

Correspondence to Yoshiki Tarai or Naofumi Sato or Isao Kobayashi or Toshiro Ogata or Kousaku Iijima or Takao Yokoe or Yuichi Uno or Yasuo Morishita or Hideaki Yokoo.

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Tarai, Y., Sato, N., Kobayashi, I. et al. A case report of lactating adenoma of the breast and review of the literatures in Japan. Breast Cancer 3, 141–144 (1996).

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Key words

  • Lactating adenoma
  • Adenoma
  • Breast