title: [Laboratory diagnosis of cystinuria].
abstract: Delayed diagnosis, apparently due to insufficient knowledge of partly simple methods of cystine determination and their practical application, is often a particular problem in the treatment of cystine lithiasis. The present paper gives a survey of a variety of laboratory methods to determine cystine in the urine both qualitatively and quantitatively. Their applicability in various diagnostic situations is discussed. In clinico-chemical routine, colorimetric cystine determinations using Brands test, but partibularly the nickel/dithionite reagent, is an established and reliable laboratory method. Possibilities of its use as quick screening assays are described.
authors.affiliation: Klinik und Poliklinik für Urologie, Medizinischen Fakultät, Friedrich-Schiller-Universität Jena.
authors.forename: W
authors.initials: W
authors.lastname: Berg
mesh_terms: D000328:Adult; D000599:Amino Acids, Diamino / Q000652:urine; D002648:Child; D002675:Child, Preschool; D003124:Colorimetry / Q000379:methods; D003555:Cystinuria / Q000175:diagnosis* / Q000235:genetics / Q000652:urine; D005260:Female; D006720:Homozygote; D006801:Humans; D008297:Male
chemical_list: D000599:Amino Acids, Diamino
vernacular_title: Labordiagnostik der Cystinurie.