Is it possible to have an arm lift after having two lymph nodes removed with a mastectomy?

A brachioplasty should not be prohibited, provided that you do not have any element of lymphedema due to your therapy.  If so, it would be riskier and your surgeon may elect not to offer you the procedure, or would perform a more conservative operation to avoid making the closure too tight.  I would recommend you seek consultation with an experienced boarded plastic surgeon.

Thank you for your question and for sharing your experience with us. An arm lift procedure is fairly invasive and will disrupt some of the lymphatics of the arms. I would recommend that you visit with a board-certified plastic surgeon who can examine you and discuss the potential risks and benefits with you in more detail. The biggest risk that you may encounter is lymphedema after the procedure. However, you have only had two nodes removed. The radiation therapy, also will increase your risk of lymphedema, particularly if it was also directed towards your axilla.

Generally this should not be a problem, but you will need an evaluation with a board certified plastic surgeon to determine your best options. 

Whether or not a plastic surgeon would be willing to perform an arm lift (brachioplasty) on you will depend on more information and an exam.  Assuming you healed well, there was only a limited lymph node dissection/removal, you have no arm edema, and you haven't had or won't need radiation, a brachioplasty may be considered.