Dear japdip, I would think that it is possible for the latest surgery to have some interference with the lymph drainage, but without details of the extent of surgery, location of the extension of incision it's difficult to say for sure. It is likewise difficult with the limited information to directly advise. I am assuming that your surgeon is aware of the swelling and there is no clinical problem (other than those noted above) that needs medical intervention? Is this edema causing other symptoms such as pain or shortness of breath? If so re-evaluation should occur. If the problem is strictly the edema, evaluation by a physical or occupational therapist or lymphedema specialist might help to give you additional suggestions. For example, making sure to optimize the mobility of your upper body on the effected side without overdoing (which could lead to more edema).
For more comprehensive information about lymphedema prevention and treatment we have information on our Cleveland Clinic Website. Which is www.clevelandclinic.org once there, click on Health Information Center, then type in lymphedema.
The extension mentioned is posterior to the axillary region. Unfortunately my surgeon is not much of a believer in lymphedema (like many other physicians I have encountered) so we don't discuss it much. I feel fortunate to have a primary care doc who does believe. I have been through the MLD program offered by the Physical Therapy Dept. and routinely follow the massage and exercise program prescribed for me as well as wearing my compression sleeve as needed.I think I am doing all the "right" things but thanks for your comments and ideas. This is a wonderful forum and has been of great benefit to me on previous occasions. Thanks to all........