This is a Proprietary Laboratory Analyses (PLA) code, meaning that the code applies to only one unique lab test made by a specific manufacturer or performed by a specific lab. Report 0491U only for CellSearch® ER Circulating Tumor Cell (CTC–ER) Test from Menarini Silicon Biosystems Inc. This test uses circulating tumor cell (CTC) selection and analysis to characterize tumor cells in the blood, using specific protein biomarkers and quantifying estrogen receptor (ER) expression.
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