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What Caused A Woman To Lactate From Her Armpit?

Discussion in 'Hospital' started by The Good Doctor, Aug 12, 2021.

  1. The Good Doctor

    The Good Doctor Golden Member

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    The woman developed a painful mass in her right armpit two days after giving birth.

    Childbirth can trigger a number of odd body changes, but for a woman in Portugal, post-pregnancy symptoms were particularly curious: She started to lactate from her armpit, according to a new report.

    The 26-year-old woman told doctors that she developed pain in her right armpit two days after giving birth, according to the report, published July 29 in The New England Journal of Medicine. When doctors examined the area, they found a round mass in her armpit. Surprisingly, the mass "released a white discharge when pressed," the authors, from Hospital de Santa Maria in Lisbon, Portugal, wrote in the report.

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    She was diagnosed with polymastia, or the presence of extra breast tissue in the body. Up to 6% of women are born with such "accessory" breast tissue, according to a 1999 paper published in the journal Mayo Clinic Proceedings. In some cases, this extra breast tissue includes a nipple or areola (the pigmented area surrounding the nipple), but in other cases, the breast tissue alone is present, without nipples or areola, Live Science previously reported.

    The condition happens during fetal development, when the precursor cells to the mammary glands form along the "mammary ridge" or "milk line" that runs from the armpit to the groin on either side of the body, according to a 2014 paper in the American Journal of Roentgenology. Usually, these ridges disappear everywhere except for the breast. But when this doesn't happen, the body is left with residual breast tissue. The most common location for accessory breast tissue is the armpit (also called the "axilla"), according to the 2014 paper.

    If the accessory breast tissue does not have a nipple or areola, people might not realize they have extra breast tissue until they become pregnant or start breast-feeding, according to the 1999 paper. At this point, milk "comes in" to the accessory breast tissue just as it does in typical breast tissue, and women may experience swelling or pain in the area.

    Some women can even pump breast milk from the accessory breast tissue. In the 1999 paper, the authors describe the case of an 18-year-old woman with accessory breast tissue in the armpit who was able to successfully pump axillary breast tissue for eight weeks to relieve discomfort and continue breast-feeding.

    In the Portugal woman's case, she was reassured that the condition is benign. Doctors also told her that when undergoing routine breast cancer screening, the extra breast tissue would need to be examined for cancer just like typical breast tissue. It's unclear if the woman was able to breast-feed or pump milk from the accessory tissue.

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