Chronic diarrhea. A. Initial management based on accompanying symptoms or features. B. Evaluation based on findings from a limited age-appropriate screen for organic disease. Alb, albumin; bm, bowel movement; Hb, hemoglobin; IBS, irritable bowel syndrome; MCH, mean corpuscular hemoglobin; MCV, mean corpuscular volume; OSM, osmolality; pr, per rectum. (Reprinted from M Camilleri: Clin Gastroenterol Hepatol 2:198, 2004.)