Immunohistochemistry Stain Form Recommended (ARUP form #32978)

Ordering Recommendation

Aid in the prediction of response to antiestrogen agents for patients with ductal carcinoma in situ (DCIS) and invasive cancers.






2-4 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation

Tumor tissue.

Specimen Preparation

Formalin fix (10 percent neutral buffered formalin) and paraffin embed tissue no later than 1 hour after removal from patient. Fixative duration: 6-72 hours. If sending precut slides, do not oven bake. Transport tissue block or 5 unstained (3-5 micron thick sections), positively charged slides in a tissue transport kit (ARUP supply #47808) available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800)522-2787.(Min: 4 slides).If sending precut slides, do not oven bake.

Storage/Transport Temperature

Room temperature or refrigerated. Ship in cooled container during summer months.

Unacceptable Conditions

Paraffin block with no tumor tissue remaining. Specimens with fixation delayed for more than one hour. Specimens fixed in any fixative other than 10 percent neutral buffered formalin. Biopsies fixed for less than 6 hours and greater than 72 hours. Cytology specimens fixed in alcohol. Decalcified specimens.


Document time from tissue acquisition to fixation and fixation duration on submitting requisition or enter at time of order. Include surgical pathology report.
If multiple specimens (blocks or slides) are sent to ARUP, they must be accompanied by one of the following: an order comment indicating that the ARUP pathologist should choose the specimen most appropriate for testing (e.g., "Choose best block"), or individual orders for each sample submitted. A Pathologist Block Selection Fee (ARUP test code 3002076) will be added to orders that utilize the first option. If multiple specimens are sent to ARUP without a request for pathologist block/slide selection or individual orders, they will be held until clarification is provided.


Ambient: Indefinitely; Refrigerated: Indefinitely; Frozen: Unacceptable

Reference Interval

Interpretive Data

Refer to report.

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes

88360 x2


Component Test Code* Component Chart Name LOINC
0049200 Estrogen Receptor IP 40556-3
0049201 % of Nuclei Staining (ER) 14228-1
0049205 Progesterone Receptor IP 10480-2
0049206 % of Nuclei Staining (PR) 14230-7
0049217 Estrog/Progest Receptor Interpretation 55229-9
0049244 Fixative Used
0049246 Time from Bx to Fixative
0049247 Duration of Fixation
2003377 Estrogen Receptor Intensity
2003378 Progesterone Receptor Intensity
2011429 EstrogRecp IHC Internal Control Staining
2011430 ProgstRecp IHC Internal Control Staining
3005643 Sample Adequacy
3005650 ERPR Reference Number 94736-6
3005651 ERPR Tissue Source 31208-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • ER and PR IHC
  • ER, PGR staining
  • ER/PgR
  • ERA & PRA
  • ERPR
  • Steroid Receptor Assay
Estrogen/Progesterone Receptor with Interpretation by Immunohistochemistry