Enlarged male breasts can look very much like female breasts. They may also look slightly puffy or downright droopy and malformed. There is no way of predicting how gynecomastia will show up from one man to the next. What science says is that, under a microscope, enlarged male breast tissue closely resembles female breast tissue. It has fat, ducts, and glandular tissue. The difference is that these tissues do not have milk production capabilities.