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Test ID PTEN Phosphatase and Tensin Homolog (PTEN) Immunostain, Technical Component Only

Test Down Notes

Effective June 18, 2026, test PTEN will be unavailable to avoid unintended ordering until a new assay is validated and implemented. No alternative test is available.


Ordering Guidance


This test includes only technical performance of the stain; no pathologist interpretation is provided.

 

Technical component only stains should not be ordered with PATHC / Pathology Consultation. If ordered with PATHC, the technical component stains will be canceled. Any immunohistochemistry (IHC)/in situ hybridization (ISH) stain performed as a part of the PATHC will be performed at the reviewing pathologist's discretion at an additional charge.



Shipping Instructions


Attach the green "Attention Pathology" address label (T498) and the pink Immunostain Technical Only label included in the kit to the outside of the transport container.



Specimen Required


Specimen Type: Tissue

Supplies: Immunostain Technical Only Envelope (T693)

Container/Tube: Immunostain Technical Only Envelope

Preferred:

-Formalin-fixed, paraffin-embedded tissue block

OR

-2 Unstained, positively charged glass slides (25- x 75- x 1-mm) per test ordered; sections 4-microns thick

Acceptable: None


Forms

If not ordering electronically, complete, print, and send a Immunohistochemical (IHC)/In Situ Hybridization (ISH) Stains Request (T763) with the specimen.

Secondary ID

614126

Useful For

Diagnosis of intraductal prostate carcinoma

Testing Algorithm

For the initial technical component only immunohistochemical (IHC) stain performed, the appropriate bill-only test ID will be reflexed and charged (IHTOI). For each additional technical component only IHC stain performed, an additional bill-only test ID will be reflexed and charged (IHTOA).

Specimen Type

TECHONLY

Specimen Stability Information

Specimen Type Temperature Time
TECHONLY Ambient (preferred)
  Refrigerated 

Reject Due To

Wet/frozen tissue Reject
Cytology smears Reject
Nonformalin fixed tissues Reject
Nonparaffin embedded tissue Reject
Noncharged slides Reject
ProbeOn slides Reject
Snowcoat slides Reject
Broken or cracked unstained slides Reject
 

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

88342-TC, primary

88341-TC, if additional IHC

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
IHTOI IHC Initial, Tech Only No No
IHTOA IHC Additional, Tech Only No No