Can breast tissue grow back after keyhole/gyno surgery?

Thanks for the question and congrats on your surgery.  An in office exam would be required to see exactly what you are feeling.  It could be breast tissue, or it could just be fatty tissue.  Depending on the body habitus and anatomy of the patient, I might completely remove all the tissue, and even do some liposuction and contouring, OR i might leave some of the breast tissue down in order to prevent a scooped out appearance in certain areas.  Typically we would not leave "lumps" behind.  This could be some residual fat that was left behind and has "died" undergoing fat necrosis which is why it could be firm and hard.  Best thing to do is ask your surgeon to examine you.  The revision rate in these types of procedures are still pretty high, so if they are an honest surgeon they will just tell you that maybe they need to do a little touch up to get it just right.  "The above answer has been given without seeing this patient and cannot be substituted for actual in-person examination and medical advice; it is only opinion. Seek in-person treatment with a trained medical professional for appropriate care."

Hi, thanks for your question.
Breast tissue won't spontaneously grow back, but you may have small amounts that are not removed. It is unlikely to undergo the usual cyclic changes if you are taking Testosterone. There is a wide variation in how top surgeries are performed amongst surgeons, one of my colleagues makes no aims to remove all breast tissue, preferring instead to keep a thick even skin flap. Whilst this more easily avoids the 'dished out' look (when the skin flaps are too thin), I have found most patients really want all of their breast tissue removed. When the nipples are maintained on pedicles, a small amount of breast gland may be retained behind the nipple and depending on the surgeon's technique, some may be present in the pedicle. This is very variable amongst surgeons.
The pedicle will become swollen post surgery and this is the most common cause of prominent lumps post op. If you have liposuction as part of your procedure, you may have areas of fat necrosis. This is common and will usually resolve with time.
I hope this information has helped!