A 28-year-old woman undergoes a hysterectomy for fibroids. During surgery, the surgeon discovers extensive endometriosis and adhesions not visible on preoperative imaging. The surgeon extends the procedure to remove the endometrial lesions without obtaining additional consent from the patient or her family. Postoperatively, the patient develops complications and files a complaint with the Medical Council. What is the most appropriate next step the surgeon should take to address this medicolegal issue?