A 63-year-old man, Andrew, presents to the emergency department with a several-day history of worsening diarrhea. He has abdominal pain rated 6/10, has been having over 8 loose stools per day for 4 days, and tells you he has seen some blood and mucus in his stools. He denies any nausea, vomiting, fevers or chills, sick contacts or recent travel. However, he tells you that he is under-going active treatment for Stage IV …