Doctors prescribe a Ceruloplasmin test in the following situations:
Diagnosing Wilson's disease in young patients presenting with unexplained chronic liver disease, acute liver failure, neurological symptoms including tremors, dysarthria, dystonia, and behavioural changes, or psychiatric manifestations where low ceruloplasmin alongside elevated urinary copper and Kayser-Fleischer rings forms the diagnostic triad that identifies this treatable copper metabolism disorder.
Investigating unexplained liver disease in children, adolescents, and young adults where Wilson's disease must be excluded as a potentially reversible cause before attributing hepatic dysfunction to other aetiologies, as missing the diagnosis leads to progressive irreversible liver and neurological damage that copper chelation could have prevented.
Evaluating neuropsychiatric presentations in young adults with movement disorders, cognitive decline, personality change, and psychosis where Wilson's disease is an important differential diagnosis and ceruloplasmin measurement is a simple and accessible first-line investigation to screen for this condition before more invasive testing.
Assessing copper deficiency states in patients with malabsorption syndromes, prolonged parenteral nutrition, excessive zinc supplementation, and bariatric surgery where low ceruloplasmin reflects systemic copper depletion causing anaemia, neutropenia, and neurological manifestations including myelopathy and peripheral neuropathy.
Investigating aceruloplasminaemia, a rare genetic disorder of complete ceruloplasmin deficiency causing progressive iron accumulation in the brain and visceral organs, in patients with a combination of diabetes, retinal degeneration, and progressive neurological deterioration where the combination of absent ceruloplasmin and elevated serum ferritin suggests this diagnosis.
Monitoring copper chelation therapy response in confirmed Wilson's disease patients where serial ceruloplasmin and urinary copper measurements track the effectiveness of treatment with penicillamine, trientine, or zinc acetate and guide dose adjustments to achieve safe and sustained copper depletion.