What is measured
CTC assays aim to detect or enrich circulating tumour cells or related rare-cell populations.
Method dependence
Results depend strongly on enrichment, detection markers, sample handling and reporting units.
Longitudinal use
Serial values can be documented as supplementary information.
Clinical limits
CTC values are not a universal standalone basis for selecting oncology treatment.
Medical notice: This content is for information and evidence orientation only and does not replace medical diagnosis or treatment decisions.