A 25-year-old woman presents to the emergency department with complaints of abdominal pain, vomiting, and diarrhea that has been present for five years. She states that no one has been able to help her up to this point. She reports numerous allergies to a variety of medications. Physical exam reveals moist mucous membranes, multiple well-healed incisions on her abdomen, and vital signs within normal limits. The patient had also brought lab results that did not appear consistent with other aspects of her presentation, and when these results were checked with the electronic health record the results she brought were found to be falsified. Which of the following is the most likely diagnosis? Borderline personality disorder Conversion disorder Factitious disorder Malingering