Review Question - QID 210958

A 71-year-old man presents to the emergency department because of blood in his stool. The patient states that he is not experiencing any pain during defecation and is without pain currently. The patient recently returned from a camping trip where he consumed meats cooked over a fire pit and drank water from local streams. The patient has a past medical history of obesity, diabetes, constipation, irritable bowel syndrome, ulcerative colitis that is in remission, and a 70-pack-year smoking history. The patient has a family history of breast cancer in his mother and prostate cancer in his father. His temperature is 98.9°F (37.2°C), blood pressure is 160/87 mmHg, pulse is 80/min, respirations are 14/min, and oxygen saturation is 98% on room air. A physical exam is notable for an obese man in no current distress. An abdominal exam reveals a non-tender and non-distended abdomen with normal bowel sounds. An abdominal radiograph and barium swallow are within normal limits. Which of the following is the most appropriate treatment for this patient’s condition?