A 16-year-old girl is brought to the PMHNP by her mother for evaluation. The mother thinks her daughter is "crazy" because she wants a nose job. The girl says she looks "hideous” with her big nose, and she will get plastic surgery as soon as she can afford it. Upon examination, the girl denies excessive preoccupation with her appearance, such as repetitive behaviors or mental acts. She says she does not compare her nose to other people's, nor does she make attempts to hide her nose. She says she is not "crazy" and that plastic surgery is common. The mother is upset because her daughter is "too beautiful" to need surgery. Which diagnosis would be most appropriate?