TY - CHAP M1 - Book, Section TI - Diarrhea A1 - McQuaid, Kenneth R. A2 - Papadakis, Maxine A. A2 - McPhee, Stephen J. A2 - Rabow, Michael W. A2 - McQuaid, Kenneth R. PY - 2023 T2 - Current Medical Diagnosis & Treatment 2023 AB - Key Clinical Updates in DiarrheaImmune checkpoint inhibitor therapy for malignancies may cause mild to severe GI side effects in 8–27% of patients.Patients with severe diarrhea or dysentery and a known history of IBD or prior immune checkpoint inhibitor therapy require expedited evaluation with stool studies and possible sigmoidoscopy or colonoscopy with biopsy to exclude infection prior to therapy with intravenous corticosteroids.Shiga-toxin–producing Escherichia coli infection should not be treated with antibiotics due to an increased risk of hemolytic-uremic syndrome, especially in children.Dougan M et al. Gastroenterology. [PMID: 33080231]Siciliano V et al. Rev Recent Clin Trials. [PMID: 32598272]Elevated fasting levels (> 48 ng/mL) of the bile acid precursor 7aC4 are strongly predictive of bile acid diarrhea.Borup C et al. Am J Gastroenterol. [PMID: 32740083] SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/24 UR - accessmedicine.mhmedical.com/content.aspx?aid=1193150753 ER -