A 76-yeаr-оld femаle with HTN, histоry оf tobаcco use, and peripheral vascular disease presents to her primary care physician complaining of intermittent epigastric abdominal pain and nausea. She states that her symptoms started 4 months ago and have been increasing in severity. The abdominal pain is dull and "gnawing," starts approximately 30 min after meals, and lasts 2–4 h. The pain is sometimes accompanied by nausea. She denies vomiting, diarrhea, hematochezia, and melena. She has gotten to the point that she fears eating and has lost 18 lbs. since her symptoms began. She has no significant past surgical history except right carotid endarterectomy. Abdominal examination is unremarkable. Routine laboratory studies are normal except for hypoalbuminemia. Gallbladder ultrasound, EGD, and colonoscopy are normal. All of the following are true regarding the most likely diagnosis EXCEPT:
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