Ms W is a 62-year-old woman who experienced wrong-site surgery when a lesion was removed from her face.Several months ago, a pink, scaly plaque on her face was biopsied and diagnosed as a 0.5-cm 2 squamous cell carcinoma. Threemonthslater,MsWenteredanoperatingroominaBoston, Massachusetts, hospital for surgery to remove the skin cancer.The morning after her surgery, Ms W removed her bandages and discovered that the surgery had been performed on an area to the right of the lesion. Ms W feels that the surgery team marked an area of skin incorrectly before the surgery was performed and believes she would have identified the mistake if she had been given a mirror in the operating room to check where the lesion was marked.After the initial surgery, Ms W began to experience shooting pain that spread from her nose to the left side of her forehead. The pain would surface 5 to 6 times per day, and she gained some relief by rubbing the area. She tried gabapentin but did not find it helpful. In addition, Ms W experienced significant swelling and bruising around her eyes and felt unable to work for a period of several weeks.Several weeks later, Ms W underwent a second procedure to remove the correct lesion.This was the second time Ms W experienced an untoward event following an elective procedure. Ten years earlier, Ms W had a pneumothorax after a trigger point injection into the trapezius muscle. Initially unrecognized by her surgeon, this led to a 2-week hospital stay, eventually requiring thoracic surgery. Ms W contacted an attorney at the time, and she was compensated by the hospital for the event.No formal legal proceedings were required.Ms W is generally healthy. She drinks socially, exercises regularly, and does not smoke. She has private health insurance. With respect to medical history, Ms W reports having viral meningitis followed by what was termed postmeningitic fibromyalgia and tinnitus. She has had a hysterectomy and breast biopsies for benign disease and is thought by a neurologist to have cervical radiculopathy, with tingling in both forearms and hands and, occasionally, in her feet.On physical examination, she looks well and has tanned skin from sun exposure. Physical findings are otherwise unremarkable. The surgical scars on her face are not readily visible.Laboratory findings are unremarkable. Medications include an estradiol patch, alprazolam as needed for anxiety, multivitamins, calcium supplements, and daily aspirin.CME available online at www.jamaarchivescme.com and questions on p 697.