HOMOVANILLIC ACID (HVA), 24 HOUR, URINE
This test is used for the screening of catecholamine secreting tumours, monitoring the treatment of neuroblastoma and evaluating patients with inborn errors of catecholamine metabolism.
How to prepare for the test?
L-Dopa is to be avoided at least for 24 hours before the collection of the sample and also during the collection of the same.