This is most likely a benign lump termed gynecomastia I have never seen one on these that are malignant on a man but they can be. If the man has a family history of breast cancer there may be reason for more concern. Most men decide to have them removed for peace of mind and sometimes for cosmetic reasons. You should also be aware that this can be a sign of steroid use. I am not saying this man uses steroids but the weightlifter history does make it something to consider. All the men I have seen with this problem have: 1) Been Benign 2) been non athletes so it can occur in any male. It is often noted a puberty in the male also and will often get smaller then. Jon Ahrendsen MD FAAFP Clarion, IA