I am going to git biopsy tomarrow what is this and what is the treatment if not cancer

Gynecomastia is swelling of the breast tissue in boys or men. It's caused by an imbalance of the hormones estrogen and testosterone. Newborns, boys going through puberty, and older men often develop gynecomastia from normal changes in hormone levels. Less often, gynecomastia is caused by a health condition such as liver disease, low testosterone production or a thyroid problem. Certain medications and illicit drugs that raise estrogen levels also can cause gynecomastia.

Gynecomastia isn't a serious problem unless it's a sign of an underlying health condition, but it can be tough to cope with. Men and boys with gynecomastia sometimes have pain or tenderness in their breasts and may feel embarrassed or unhappy with their bodies.

In most cases, gynecomastia will go away on its own. If it is caused by medications or illicit drugs, it usually goes away after they are stopped. Gynecomastia is often treated with medications that help balance hormone levels. In some cases, surgery to remove breast tissue is an option.

Your doctor will want to be sure your breast swelling is actually gynecomastia and not another condition. Other conditions that can cause similar symptoms include:

Fatty breast tissue. Some men and boys have chest fat that resembles gynecomastia. This is called pseudogynecomastia or false gynecomastia, and it isn't the same as gynecomastia.
Breast cancer. This is uncommon in men but can occur. Enlargement of one breast or the presence of a discrete firm nodule raises the concern for male breast cancer.
A breast abscess (mastitis).
Initial tests to determine the cause of your gynecomastia may include:

Blood tests
Mammograms
You may need further testing depending on your initial test results, including:

Chest X-rays
Computerized tomography (CT) scans
Magnetic resonance imaging (MRI) scans
Testicular ultrasounds
Tissue biopsies

it's not cancer..it's excess breast tissue in men.
They do Lipo for it now and it makes a difference (shows on TLC and Discovery Health have had shows about it...) more men than you would think have the problem and it has nothing to do with weight or illness.

Breast enlargement in a male. It usually involves only the nipple and nearby tissue of one breast. More rarely, the whole breast grows to a size normal in a female. True gynecomastia is related to an increase in estrogens. Testicular or pituitary-gland tumours commonly cause gynecomastia. Similar conditions (pseudogynecomastia) are caused by excessive body fat, inflammatory disorders, granular lesions, or growth of tumours. Treatment involves hormone therapy, correction of the estrogen disorder, or tumour removal.

Treatment
Treating the underlying cause of the gynecomastia may lead to improvement in the condition. Patients should talk with their doctor about revising any medications that are found to be causing gynecomastia; often, an alternative medication can be found that avoids gynecomastia side-effects, while still treating the primary condition for which the original medication was found not to be suitable due to causing gynecomastia side-effects (e.g., in place of taking spironolactone the alternative eplerenone can be used.) Selective estrogen receptor modulator medications, such as tamoxifen and clomiphene, or androgens or aromatase inhibitors such as Letrozole are medical treatment options, although they are not universally approved for the treatment of gynecomastia. Endocrinological attention may help during the first 2-3 years. After that window, however, the breast tissue tends to remain and harden, leaving surgery (either liposuction, gland excision, skin sculpture, reduction mammoplasty, or a combination of these surgical techniques) the only treatment option. Many American insurance companies deny coverage for surgery for gynecomastia treatment on the grounds that it is a cosmetic procedure. Radiation therapy is sometimes used to prevent gynecomastia in patients with prostate cancer prior to estrogen therapy. Compression garments can camouflage chest deformity and stabilize bouncing tissue bringing emotional relief to some. There are also those who choose to live with the condition.-