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The triad of polydipsia, polyuria, and polyphagia with weight loss is a classic presentation of diabetes mellitus. Among adolescents, type 1 (autoimmune) diabetes mellitus is the most probable diagnosis. With these three symptoms, the differential diagnosis is quite limited, but diabetes insipidus, either nephrogenic or central, should also be considered. Diabetes insipidus is characterized by polydipsia, polyuria, and weight loss, but not polyphagia, and the weight loss is due to a decreased caloric
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Source Information
From the Maccabi Juvenile Diabetes Center, Ramat Hasharon, Israel (O.P.-H.); and the Division of Endocrinology, Department of Pediatrics, University of Colorado Health Science Center, Denver (P.Z.).
Address reprint requests to Dr. Pinhas-Hamiel at Maccabi Juvenile Diabetes Center, 5 Usishkin St., P.O. Box 1773, Ramat Hasharon, 47117 Israel, or at c12502@coop.co.il.
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