A 68-year-old woman with hypertension, type 2 diabetes melli…

A 68-year-old woman with hypertension, type 2 diabetes mellitus, and hyperlipidemia presents for psychiatric evaluation on referral from the emergency department, where she has presented six times in the last year because of her concern that she has pancreatic cancer. She reports generalized abdominal discomfort that “comes and goes.” A thorough medical workup, including imaging and evaluation by a gastroenterologist, is negative. She is anxious and complains of poor sleep due to her concerns about her health. She has no other psychiatric symptoms or prior history. Which of the following somatic symptom and related disorders is the most likely diagnosis?