I have a different take on weight loss prior to surgery. First, surgery is better and safer if you are at a comfortable weight for yourself. If a patient plans to lose lots of weight, then certainly it is better to take it off prior to surgery.
On the other hand, there are many men who have problems losing weight because their gyne is an embarrassment for them at the gym, pool, etc. It then becomes a Catch-22 situation: lose weight to get better surgery results but you need the surgery to feel comfortable to go to the gym to lose weight. What to do?
I take a graduated approach with my patients. If they are in reasonable shape, albeit a few pounds overweight, then I will perform the surgery, which always involves liposuction and frequently involves gland excision. The goal of surgery is to provide a trim and contoured chest which is consistent with the general frame of the patient. I will generally look at the pinch of skin/fat just under the collarbone and attempt to provide that same pinch all the way down the chest -- down to the lower ribs. In a very thin patient, the pinch will be thin. In a patient who is overweight (ie BMI up to around 30 or so), I will leave a slightly thicker pinch. Then, once the gyne is removed (I call it an "excuse-ectomy"), the patient becomes more motivated to exercise, watch their diet and lose weight -- and their chest will get even better!
It is important to understand that weight loss, in general, results in only a shrinkage of fat cells -- the cells themselves remain. Liposuction physically removes the fat cells from the body. Therefore, if lipo is done on someone who still has some weight, we will be removing "plump" fat cells. If lipo is done on a thinner person, then we are removing "thinner" fat cells. But fat cells are removed in either case -- and they do not grow back!
Extremely overweight individuals are never good candidates for the standard lipo and excision -- they tend to be disappointed with the results because they didn't end up with what they envisioned: a taut bodybuilder's chest, albeit on top of a large, fat body.
Bottom line: each case is individual and the patient should discuss all possibilities with the surgeon in order to gauge potential results. And just as each patient is different, each surgeon, too, will have his own unique and individual approach to the surgical treatment of gynecomastia. What counts is the end result -- not the road by which the result was achieved.
Dr Jacobs