A 70-year-old man presents to the clinic with a 6-month history of worsening fatigue, an unintentional weight loss of 15 lbs, and left-sided abdominal discomfort. He reports feeling full quickly after eating just a few bites. He denies any fevers but admits to experiencing drenching night sweats. His past medical history is significant for hypertension, for which he takes amlodipine. He does not smoke and drinks alcohol occasionally. He appears chronically ill and pale. He is afebrile. His blood pressure is 130/80 mmHg with a heart rate of 92 bpm and a respiratory rate of 16 breaths per minute. He is pale and appears chronically ill.