Ahh geez man, i don't have a clue. All i can do is wish you luck and pray for you.
Sorry i can't help

Thanks folks for the info. The lump is below my right nipple, and when I push on it, it leaks a clear fluid from the nipple. I've also gone from 175lbs to 120lbs in the past 2 years. So yeah, I'm worried. Again thanks again to you all for the responses. Gonna keep my chin up and hope for the best.
Edit to add. It's not really swelling, there just seems to be a small ball inside there. Doesn't hurt. Is it a cyst? It only leaks clear fluid (plasma?).

Slash, though I am a woman currently going through treatments for breast cancer, I want you to know that I understand your fear. I was freaked out myself. My treatments are working wonderfully and I will not lose the breast. Once you get checked, things will move quickly. You will probably have many tests and doctors visits initially. Please send a private message if you want to talk.

First, don't automatically assume that because there is a discharge it's cancer. Do you have enlarged breast tissue? Gynecomastia is an abnormal enlargement of the male breast tissue due to hormonal imbalance...testosterone decreases while estradiol increases. This can happen for a number of reasons but is most common in male puberty. Obesity, testicular tumors, liver disease adrenal carcinoma, tuberculosis, Hodgkins's disease, injury and orchitis are other causes. Drugs like digitalis and opiates are also linked.

Male breast cancer is extremely rare and there are only about 1900 diagnosis per year in the US (don't know if you are american or not, but it still will put it into perspective anyway) and it's etiology is genetic, hormonal and environmental.

I don't know if any of this helps you or not, but I'm a nursing student and please let me know if there is anything else I can help research for you. Most likely you will get blood work and possibly a biopsy. Just try to remain calm until you talk with your doctor. Take care.

edit: Sorry didn't see your last post, it sounds like a cyst from what you are describing, but that's just an opinion on my part, and regardless, blood work and a biopsy are most likely what your doctor will do first.