Are all gynecomastia surgeries considered “bilateral”? January 25, 2023 Bilateral gynecomastia refers to excess breast tissue in both breasts. Not all men need tissue removed from both sides of their chest; oftentimes, gynecomastia can only affect one side, causing an asymmetrical appearance. When looking for a male breast reduction surgeon in Houston, it’s important that you find a surgeon willing to provide you with an educational, consultative approach to your treatment plan so you can make the best decision for your unique body type and aesthetic goals.