Gynaecomastia is the most common condition in males [1]. An oestrogen surge (in young men), or a drop in testosterone in men older than 60 years can influence development of the rudimentary ducts and lobules behind the nipple producing a symmetrical or asymmetrical lump. This is easily assessed by ultrasound to determine its dendritic nature. More asymmetric and harder masses can also be assessed by ultrasound although mammography is useful for excluding calcifications and secondary lesions.

Doyle et al. [3] in a review study, concluded most male symptoms are benign. However, some radiological features that are considered benign in a female are more uncertain in males, such as well-defined masses or larger rounder and scattered calcifications. In males breast cancer often presents as a firm subareolar mass eccentric to the nipple [1].