The presence of gynecomastia does not make you more prone to breast cancer. Several studies have concluded that there is no increased risk of male breast cancer in those men with gynecomastia. It is important to note, however, that one percent of all breast cancers do occur in men. While it is very rarely seen in young men, older men must be made aware of this possibility. Therefore, any new lump, one-sided growth (asymmetry of the breast), skin changes of the breast or nipple, or bloody nipple discharge should be immediately investigated by a physician. A biopsy, a mammogram or a sonogram (ultrasound) examination may be advised.