I’ve often heard the term ‘a third nipple’ but I've never looked into it until today. Whilst preparing for a demonstrating session about mammary glands, I came across the term ‘polymastia’ and ‘polythelia’, otherwise known as an extra breast and an extra nipple, respectively. Immediately intrigued by this, I googled it and found images of these breasts and nipples. One particular case that caught my attention was a breast and nipple on the sole of a woman’s foot! A 22-year old woman sought medical attention for a lesion which she had on her left foot since birth (see picture below). The lesion was identified as a pseudomamma: incomplete breast tissue and a nipple. Further histological examination (examining tissue under a microscope) of the lesion confirmed the diagnosis as class 5 pseudomamma based on the Kajava classification system. The presence of fat, a nipple, an areola, and the absence of glandular tissue classified the lesion as a pseudomamma. This was the first known diagnosis of a pseudomamma on the sole of a foot. The patient eventually had the pseudomamma removed.
(1) Conde DM, Kashimoto E, Torresan RZ and Alvarenga M (2006) Pseudomamma on the foot: An unusual presentation of supernumerary breast tissue. Dermatology Journal Online. 12(4).
(3) Fleurs des Champs image: Wikimedia Commons
6 years ago