Neonatal urinary HVA and VMA (neuroblastoma markers) levels in filter paper samples were determined as part of a feasibility study on screening for neuroblastoma. Urine samples from 531 neonates ...

Homovanillic acid (HVA) is a major metabolite of dopamine released in the brain, and although plasma concentrations of this metabolite are influenced by other factors, it may be a useful indicator ...