Woman produces milk from armpit after childbirth, diagnosed with extra breast tissue

A 26-year-old woman in Portugal started lactating from her armpit, said a study published in The New England Journal of Medicine. She was diagnosed with polymastia, wherein accessory breast tissue develops along former embryonic mammary ridge. She was reassured the condition is benign. In polymastia, it's important that routine screening for breast cancer include examination of accessory tissue.