Thank you for providing pictures.More then likely its a bit of both gynecomastia and fat. Its hard to say without having an in person consultation. Make sure that when choosing your surgeon he is a Board Certified Surgeon, ask to see before and after photos and reviews.Best of luck to you
Thank you for sharing your question and photographs. Only an in-person assessment of your tissues would allow definitive diagnosis, as you may have either gynecomastia or pseudogynecomastia. See an ASPS board certified plastic surgeon in consultation for treatment options. Best wishes.