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moles on armStudies published in PLOS Medicine have indicated that the number of moles on a woman’s left arm could be an indicator of breast cancer.  Researchers in the study found that women with 15 or more moles on the left arm were up to 35% more likely to develop breast cancer compared to women with no moles on the left arm (Cool, 2014).  There were two studies done on 164,484 women (in total) over a period of 18-24 years.

How can moles predict cancer risk? 

The researchers do not believe that moles cause breast cancer but individuals who have the moles on the left arm may have higher blood levels of estrogen and testosterone which may contribute to breast cancer.  Previous studies also indicate breast cancer to linked to hormonally influenced disorders such as endometriosis, uterine fibroids and thyroid disease.

To read more on this topic, click on the following link:

Cool, L. (2014). Yahoo Health, “Number of moles surprisingly linked to breast cancer risk”. Retrieved June 20, 2014, from: http://www.skininc.com/skinscience/physiology/Number-of-Moles-Surprisingly-Linked-to-Breast-Cancer-Risk–262887901.html?utm_source=newsletter-html&utm_medium=email&utm_campaign=SI+E-Newsletter+06-18-2014