Thermometer Urinary Infection Urine Homovanillic Acid General Information Material studied Urine. Reliability of test results Good. Before the test Purpose of test Helps confirm diagnosis of tumors and some disorders of the autonomic nervous system.
Helps rule out pheochromocytoma.
Commercial laboratory, hospital, doctor's office. Lab technician, nurse, doctor. Risks and precautions None. Avoid excessive physical exercise or stressful situations during the collection period. No changes necessary.