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HelpEstrogen/Progesterone Receptor Assay (ER/PR)
Additional Codes
| Epic ID | LAB2255 |
Order LAB2255.
Specimen Requirements
Tissue should be fixed in 10% formalin. Site is selected by the pathologist. Specimen is processed by the histology department. Time of collection must be noted.
Stability/Transport
Unprocessed: 20 minutes @ room temperature.
Processed: 6-48 hours in formalin, then 14 days in 70% alcohol.
Performing Lab
Allen Hospital Laboratory
Useful For
Estrogen receptors are cellular proteins which bind their respective steroid hormone as a prerequisite to eliciting a cellular response. Measurement of estrogen receptors in the cytosol of mammary carcinoma tissue is performed to assess whether or not a tumor is likely to respond to endocrine therapy. Notes: 1) Estrogen receptor negative tissue rarely responds to endocrine therapy. 2) Approximately 55% of estrogen receptor positive tumors will respond to endocrine therapy.
Day(s) Performed
Monday-Friday
Report Available
1 day
CPT Code Information
84342x4