American family physician
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American family physician · Apr 2020
Chronic Diarrhea in Adults: Evaluation and Differential Diagnosis.
Chronic diarrhea is defined as a predominantly loose stool lasting longer than four weeks. A patient history and physical examination with a complete blood count, C-reactive protein, anti-tissue transglutaminase immunoglobulin A (IgA), total IgA, and a basic metabolic panel are useful to evaluate for pathologies such as celiac disease or inflammatory bowel disease. More targeted testing should be based on the differential diagnosis. ⋯ Osmotic diarrhea can present with carbohydrate malabsorption syndromes and laxative abuse. Fatty diarrhea can be caused by malabsorption or maldigestion and includes disorders such as celiac disease, giardiasis, and pancreatic exocrine insufficiency. Inflammatory diarrhea warrants further evaluation and can be caused by disorders such as inflammatory bowel disease, Clostridioides difficile, colitis, and colorectal cancer.
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Most patients with burn injuries are treated as outpatients. Two key determinants of the need for referral to a burn center are burn depth and percentage of total body surface area involved. All burn injuries are considered trauma, prompting immediate evaluation for concomitant injuries. ⋯ Pruritus, hypertrophic scarring, and permanent hyperpigmentation are long-term complications of partial-thickness burns. Burn injuries are more likely to occur in children and older people. Patient education during primary care visits may be an effective prevention strategy.
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Aneuploidy is the presence of one or more extra chromosomes or the absence of one or more chromosomes. The risk of fetal aneuploidy rises with increasing maternal age. Because fetal aneuploidy can affect any pregnancy, all pregnant women should be offered screening. ⋯ It may be performed as primary screening or as a follow-up test to abnormal findings on first- or second-trimester screenings. Second-trimester ultrasonography has limited utility in aneuploidy screening in women who have already been screened with a first- or second-trimester serum test. Diagnostic tests following a positive screening result include chorionic villus sampling performed between 10 and 13 weeks' gestation or amniocentesis performed after 15 weeks' gestation.