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Chronic Diarrhea & Malabsorption Workup Explained | USMLE |
Chronic diarrhea & Malabsorption syndromes are very broad topics,explained clearly in this video. Learning objective of this video is to give you a step wise approach to chronic diarrhea. chronic diarrhea causes, symptoms and difference between secretory and osmotic diarrhea is explained in this video which is a frequently tested topic of USMLE STEP 1 & USMLE STEP 2 CK.Celiac disease,irritable bowel syndrome, bloody diarrhea is also explained. in my previous video i talked about acute diarrhea workup and acute diarrhea treatment and management if you havent watched that link is given below.
Chronic diarrhea, defined as a decrease in stool consistency for more than four weeks, is a common but challenging clinical scenario. It can be divided into three basic categories: watery, fatty (malabsorption), and inflammatory. Watery diarrhea may be subdivided into osmotic, secretory, and functional types. Watery diarrhea includes irritable bowel syndrome, which is the most common cause of functional diarrhea. Another example of watery diarrhea is microscopic colitis, which is a secretory diarrhea affecting older persons. Laxative-induced diarrhea is often osmotic. Malabsorptive diarrhea is characterized by excess gas, steatorrhea, or weight loss; giardiasis is a classic infectious example. Celiac disease (gluten-sensitive enteropathy) is also malabsorptive, and typically results in weight loss and iron deficiency anemia. Inflammatory diarrhea, such as ulcerative colitis or Crohn disease, is characterized by blood and pus in the stool and an elevated fecal calprotectin level. Invasive bacteria and parasites also produce inflammation. Infections caused by Clostridium difficile subsequent to antibiotic use have become increasingly common and virulent. Not all chronic diarrhea is strictly watery, malabsorptive, or inflammatory, because some categories overlap.
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