A 57-year-old Wall Street broker has been suffering from intermittent constipation and diarrhea for several months. He complains of abdominal pain and a feeling of fullness. He has been taking Metamucil to add fiber to his diet and to have regular bowel movements, without consulting a doctor as he is too busy. After noticing that his feces are black in color for the last several days, he goes to see a doctor.
1. What additional tests will the doctor order?
2. List two possible clinical diagnoses. Explain your answer.
3. What are some possible treatments for each of the diagnoses?