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Test Code KLISH Kappa and Lambda Light Chain mRNA, In Situ Hybridization (ISH) Technical Component Only

Advisory Information

This test includes only technical performance of the stain (no pathologist interpretation is performed). If diagnostic consultation by a pathologist is required order PATHC / Pathology Consultation.

Shipping Instructions

Attach the green pathology address label and the pink Immunostain Technical Only label included in the kit to the outside of the transport container.

Specimen Required

Supplies: Immunostain Technical Only Envelope (T693)

Specimen Type: Tissue

Container/Tube: Immunostain Technical Only Envelope (T693)

Preferred: 5 Unstained positively charged glass slides (25- x 75- x 1-mm) per test ordered; sections 4-microns thick.

Acceptable: Formalin-fixed, paraffin-embedded (FFPE) tissue block

Additional Information:

1. Information on accessing digital images of immunohistochemistry (IHC) stains and the manual requisition form can be accessed through this website:

2. Clients ordering stains using a manual requisition form will not have access to digital images.

3. Clients wishing to access digital images must place the order for IHC stains electronically. Information regarding digital imaging can be accessed through this website:


If not ordering electronically, complete, print, and send an Immunohistochemical (IHC)/In Situ Hybridization (ISH) Stains Request Form (T763) (

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
ISTOI ISH Initial, Tech Only No No
ISTOA ISH Additional, Tech Only No No

Method Name

In Situ Hybridization

Reporting Name

Kappa/Lambda ISH, Tech Only

Specimen Type


Specimen Stability Information

Specimen Type Temperature Time
TECHONLY Ambient (preferred)

Reject Due To








Wet/frozen tissue
Cytology smears
Nonformalin fixed tissue 
Nonparaffin embedded tissue
Noncharged slides
ProbeOn slides


The positive and negative controls are verified as showing appropriate immunoreactivity. If a control tissue is not included on the slide, a scanned image of the relevant quality control tissue is available upon request; contact 855-516-8404.


Interpretation of this test should be performed in the context of the patient's clinical history and other diagnostic tests by a qualified pathologist.


No significant cautionary statements

Day(s) and Time(s) Performed

Monday through Friday

Analytic Time

1 day

Specimen Retention Time

Until staining is complete

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed using an analyte specific reagent. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

88365-TC, primary

88364-TC, if additional ISH

LOINC Code Information

Result ID Test Result Name Result LOINC Value
70792 Kappa/Lambda ISH, Tech Only No LOINC Needed