HER-2/neu, Serum

Casandra

Casandra Test Code LC30545Version 1 (DRAFT)

Performing Lab

Lab LabcorpLab Test ID 480136CPT Code 83950

Also known as: HER-2 Extracellular Domain (ECD), HER-2/neu Shed Antigen

Clinical Use

Order Test

Use

Quantitative measure of HER-2/neu in human serum. HER-2/neu values obtained may be used in the follow-up and monitoring of patients with metastatic breast cancer. HER-2/neu values should be used in conjunction with information available from clinical and other diagnostic procedures in the management of breast cancer. The clinical utility of the measurement of HER-2/neu as a prognostic indicator for early recurrence and in the management of patients on immunotherapy regimens has not been fully established.

Special Instructions

Values obtained with different assay methods or kits cannot be used interchangeably. Results cannot be interpreted as absolute evidence of the presence or absence of malignant disease. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Limitations

Elevated levels of serum HER-2/neu are observed in a subset of patients with HER-2/neu-positive tumors. Approximately 25% to 30% of breast cancers demonstrate overexpression of the HER-2/neu protein. The clinical utility of the measurement of HER-2/neu as a prognostic indicator for early recurrence and in the management of patients on immunotherapy regimens has not been fully established.

Test Details