Identifies: Estrogen receptor alpha, a prognostic and predictive marker in breast cancer. Antibodies to ER can also be employed as part of a panel of antibodies in the identification of the primary site of carcinomas presenting as metastases.
Subcellular Localization: Nuclear
CPT Code(s): 88360 or 88342 or 88341 (reference only; CPTs may vary)
Turnaround Time: Within 1-2 business days of receipt
Schedule: Monday - Friday
• Formalin-fixed, paraffin-embedded (FFPE) tissue block or cell block - OR -
• 1 unstained slide for each test requested plus 3-4 additional unstained slides cut at 4µm