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False positive results in a neuroblastoma screening programme

✍ Scribed by Bell, Susan ;Parker, Louise ;Craft, Alan W. ;Dale, Gordon ;McGill, Andrew C. ;Seviour, John ;Cole, Michael ;Smith, Julian

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
347 KB
Volume
22
Category
Article
ISSN
0098-1532

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✦ Synopsis

Abstract

Twenty thousand, eight hundred and twenty‐nine babies were screened for neuroblastoma at 6 months of age by measuring homovanillic (HVA) and vanillylmandelic (VMA) acid in urine and ratioing these to creatinine. Using a β€žcut off”︁ of the mean + 3 SD, 10 were found to be positive. Two were found on evaluation to have neuroblastoma and in the remaining 8 the raised levels of HVA and/or VMA returned to normal. Only one of the 8 false positive babies was absolutely normal, most having a chronic disorder or illness. Utilising new centiles which relate HVA and VMA to creatinine, only 3 of the 8 would have remained positive, a false positive rate of 0.01%. The false negative rate would have remained unchanged.

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