Case Presentation: A 60-year-old female with a history of hypertension, mild hypercalcemia, ESRD on hemodialysis, and pulmonary fibrosis status-post right lung transplant 6 years prior presented with acute on chronic diffuse abdominal pain, nausea, and diarrhea for 7 months.  She had no recent hospitalizations, antibiotic use, or sick contacts. She was seen multiple times in [...]

Case Presentation: An 80-year-old male with a history of collagenous colitis, hypertension, type 2 diabetes, microcytic anemia, exocrine pancreatic insufficiency, severe malnutrition, and vitamin D deficiency presented with weakness, chronic diarrhea, and significant weight loss (~100 lbs in one year). He had 5-7 non-bloody stools daily, unresponsive to colestipol and loperamide, accompanied by abdominal bloating [...]