Editing Breast (section)

===Male breasts===
Both females and males develop breasts from the same [[embryology|embryological]] tissues. Anatomically, male breasts do not normally contain lobules and acini that are present in females. In rare instances, it is possible for very few lobules to be present; this makes it possible for some men to develop lobular carcinoma of the breast.<ref>{{Cite journal |last1=Erhan |first1=Yamaç |last2=Zekioglu |first2=Osman |last3=Erhan |first3=Yildiz |date=October 2006 |title=Invasive lobular carcinoma of the male breast |journal=Canadian Journal of Surgery. Journal Canadien de Chirurgie |volume=49 |issue=5 |pages=365–366 |issn=0008-428X |pmc=3207588 |pmid=17152578}}</ref> Normally, males produce lower levels of estrogens and higher levels of [[androgen]]s, namely [[testosterone]], which suppress the effects of estrogens in developing excessive breast tissue. In boys and men, abnormal breast development is manifested as [[gynecomastia]], the consequence of a biochemical imbalance between the normal levels of estrogen and testosterone in the male body.<ref>{{cite book |author = Olson, James Stuart |title = Bathsheba's Breast: Women, Cancer and History |publisher = The Johns Hopkins University Press |location = Baltimore |year = 2002 |page = [https://archive.org/details/bathshebasbreast00olso/page/109 109] |oclc = 186453370 |isbn = 978-0-8018-6936-5 |url = https://archive.org/details/bathshebasbreast00olso/page/109 }}</ref> Around 70% of boys temporarily develop breast tissue during adolescence.<ref name=mgh2010/> The condition usually resolves by itself within two years.<ref name=mgh2010/> When [[male lactation]] occurs, it is considered a symptom of a disorder of the [[pituitary gland]].