Well Winston's mast cell tumor is gone, but about 5 days after the surgery he developed a seroma. Nothing really to worry about because it is just a pocket of clear serous fluid that can form after surgery. So we tried warm compressing to help bring down the swelling, then we tried the compression wrap you see above. Nothing worked, it actually got bigger. So last night we went back to the hospital for a recheck. The doctor decided it would be best to insert a needle into the pocket of fluid and make sure it wasn't infected. The fluid was clear and that was a good sign. He drained the rest of the fluid and put another compression wrap on Winston. Hopefully this will keep the fluid from building back up.