False-positive results of genetic testing in cystic fibrosis.

Warren, W S; Hamosh, A; Egan, M; Rosenstein, B J · J Pediatr · 1997

case_report · Level V

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Abstract

We describe a patient in whom newborn immunoreactive trypsin screening and mutation analysis suggested a diagnosis of cystic fibrosis; however, the clinical course and sweat test results were not consistent with the diagnosis. Direct sequencing of the patient's genomic DNA showed compound heterozygosity for delta F508 and F508C, a polymorphism not associated with clinical disease.

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