I've watched them remove lesions on my husband. Usually and be warned, this sounds gory, they slide a pair of tissue scissors under the skin around the incision an inch or more to loosen it, then they have enough slack to pull the margins together to suture.part of the problem is she's so skinny there is no extra skin or meat on her bones to sew the incision back together with out STRETCHING the skin extremely tight and using an obscene amount of stitches. She doesn't eat right , and she follows the Dr's instructions that she likes.
Back in 08 I had a cyst on my lower back get infected and had to have it taken out under emergency conditions. Doctor sutured it together and we pulled the sutures at 2 weeks as he prescribed. I bent over and it popped open. Probably still had some infection in it low grade. No more suturing. They usually leave it open to heal naturally or pack it to get it to heal from the inside out.
Poor kid. That sounds really painful not to mention miserable.
