Test Catalog

Test Id : TLPMF

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T-Cell Lymphoma, Specified FISH, Varies

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Overview

Test Catalog

Useful For
Suggests clinical disorders or settings where the test may be helpful

Detecting a neoplastic clone associated with the common chromosome abnormalities seen in patients with various T-cell lymphomas using client specified probes

 

Tracking known chromosome abnormalities and response to therapy in patients with T-cell lymphoma

 

Evaluating specimens in which standard cytogenetic analysis is unsuccessful

Reflex Tests
Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.

Test Id Reporting Name Available Separately Always Performed
TLPMB Probe, Each Additional (TLPMF) No No

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

This test includes a charge for application of the first probe set (2 fluorescence in situ hybridization [FISH] probes) and professional interpretation of results. Analysis charges will be incurred based on the number of cells analyzed per probe set.

 

When specified, any of the following probes will be performed:

14q32.1 rearrangement, TCL1A break-apart

14q11.2 rearrangement, TRAD break-apart

i(7q), D7Z1/D7S486

+8, D8Z2/MYC

 

For more information see Bone Marrow Staging for Known or Suspected Malignant Lymphoma Algorithm.

Method Name
A short description of the method used to perform the test

Fluorescence In Situ Hybridization (FISH)

NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.

Yes

Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test

T-cell Lymphoma B/BM, Spec FISH

Aliases
Lists additional common names for a test, as an aid in searching

+8 (trisomy 8)

Hepatosplenic T-cell Lymphoma

inv(14) - inversion 14

Iso(7q) - isochromosome 7q

T-cell Prolymphocytic Leukemia (T-PLL)

TCL1A (14q32) rearrangement

TRAD (14q11.2) rearrangement

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

This test includes a charge for application of the first probe set (2 fluorescence in situ hybridization [FISH] probes) and professional interpretation of results. Analysis charges will be incurred based on the number of cells analyzed per probe set.

 

When specified, any of the following probes will be performed:

14q32.1 rearrangement, TCL1A break-apart

14q11.2 rearrangement, TRAD break-apart

i(7q), D7Z1/D7S486

+8, D8Z2/MYC

 

For more information see Bone Marrow Staging for Known or Suspected Malignant Lymphoma Algorithm.

Specimen Type
Describes the specimen type validated for testing

Varies

Ordering Guidance

This test is intended for instances when limited T-cell lymphoma fluorescence in situ hybridization (FISH) probes are needed. The FISH probes to be analyzed must be specified on the request, otherwise test processing may be delayed in order to determine intended analysis. If specific probes are not included with this test request, the test may be canceled and automatically reordered by the laboratory as TLPDF / T-Cell Lymphoma, Diagnostic FISH, Varies.

 

If the entire T-cell lymphoma panel is preferred, order TLPDF / T-Cell Lymphoma, Diagnostic FISH, Varies.

 

For patients with T-cell acute lymphoblastic leukemia/lymphoma (T-ALL/LBL), order either TALAF / T-Cell Acute Lymphoblastic Leukemia/Lymphoma (ALL), FISH, Adult, Varies. or TALPF / T-Cell Acute Lymphoblastic Leukemia/Lymphoma (ALL), FISH, Pediatric, Varies depending on the age of the patient.

 

For testing paraffin-embedded tissue samples from patients with T-lymphoblastic lymphoma (T-BLB), see TLBLF / T-Lymphoblastic Leukemia/Lymphoma, FISH, Tissue.

Shipping Instructions

Advise Express Mail or equivalent if not on courier service.

Necessary Information

1. A list of probes requested for analysis is required. Probes available for this test are listed in the Testing Algorithm section.

2. A reason for testing and a flow cytometry and/or a bone marrow pathology report should be sent with each specimen. The laboratory will not reject testing if this information is not provided, but appropriate testing and interpretation may be compromised or delayed. If this information is not provided, an appropriate indication for testing may be entered by Mayo Clinic Laboratories.

ORDER QUESTIONS AND ANSWERS

Question ID Description Answers
GC141 Reason for Referral
GC142 Probes Requested
GC143 Specimen Whole blood ACD
Bone marrow ACD
Whole blood Na Hep
Bone marrow Na Hep
Whole blood EDTA
Bone marrow EDTA

Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing

Submit only 1 of the following specimens:

 

Preferred

Specimen Type: Bone marrow

Container/Tube:

Preferred: Yellow top (ACD)

Acceptable: Green top (heparin) or lavender top (EDTA)

Specimen Volume: 2-3 mL

Collection Instructions:

1. It is preferable to send the first aspirate from the bone marrow collection.

2. Invert several times to mix bone marrow.

 

Acceptable

Specimen Type: Blood

Container/Tube:

Preferred: Yellow top (ACD)

Acceptable: Green top (heparin) or lavender top (EDTA)

Specimen Volume: 6 mL

Collection Instructions: Invert several times to mix blood.

Special Instructions
Library of PDFs including pertinent information and forms related to the test

Forms

If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.

Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

Blood: 2 mL

Bone Marrow: 1 mL

Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen Type Temperature Time Special Container
Varies Ambient (preferred)
Refrigerated

Useful For
Suggests clinical disorders or settings where the test may be helpful

Detecting a neoplastic clone associated with the common chromosome abnormalities seen in patients with various T-cell lymphomas using client specified probes

 

Tracking known chromosome abnormalities and response to therapy in patients with T-cell lymphoma

 

Evaluating specimens in which standard cytogenetic analysis is unsuccessful

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

This test includes a charge for application of the first probe set (2 fluorescence in situ hybridization [FISH] probes) and professional interpretation of results. Analysis charges will be incurred based on the number of cells analyzed per probe set.

 

When specified, any of the following probes will be performed:

14q32.1 rearrangement, TCL1A break-apart

14q11.2 rearrangement, TRAD break-apart

i(7q), D7Z1/D7S486

+8, D8Z2/MYC

 

For more information see Bone Marrow Staging for Known or Suspected Malignant Lymphoma Algorithm.

Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

T-cell neoplasms are relatively uncommon, accounting for approximately 12% of all non-Hodgkin lymphomas. There are several subtypes of T-cell neoplasms: T-lymphoblastic leukemia , T-cell prolymphocytic leukemia , T-cell large granular lymphocytic leukemia , anaplastic large cell lymphoma , peripheral T-cell lymphoma, and various other cutaneous, nodal, and extranodal lymphoma subtypes.

 

There are a few common chromosome abnormalities associated with specific T-cell lymphoma subtypes evaluated by this FISH test as seen in the following table.

 

Table. Common Chromosome Abnormalities in T-Cell Lymphomas

Lymphoma subtype

Chromosome abnormality

Fluorescence in situ hybridization probe

T-cell prolymphocytic leukemia/lymphoma (T-PLL)

inv(14)(q11q32) and t(14;14)(q11;q32)

5'/3'TCL1A

     Reflex: 14q11.2 rearrangement

5'/3'TRAD

Hepatosplenic T-cell lymphoma

Isochromosome 7q

D7S486/D7Z1

Trisomy 8

D8Z2/MYC

 

These probes have diagnostic relevance and can also be used to track response to therapy.

Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

An interpretive report will be provided.

Interpretation
Provides information to assist in interpretation of the test results

A neoplastic clone is detected when the percent of cells with an abnormality exceeds the normal reference range for any given probe.

 

Detection of an abnormal clone supports a diagnosis of a T-cell lymphoma. The specific abnormality detected may help subtype the neoplasm.

 

The absence of an abnormal clone does not rule out the presence of lymphoma.

Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

This test is not approved by the U.S. Food and Drug Administration, and it is best used as an adjunct to existing clinical and pathologic information.

 

Bone marrow is the preferred sample type for this fluorescence in situ hybridization test. If bone marrow is not available, a blood specimen may be used if there are neoplastic cells in the blood specimen (as verified by a hematopathologist).

Supportive Data

Clinical Reference
Recommendations for in-depth reading of a clinical nature

1. Swerdlow S, Campo E, Harris NL, et al, eds: WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues. IARC Press; 2017

2. Gesk S, Martin-Subero JI, Harder L, et al: Molecular cytogenetic detection of chromosomal breakpoints in T-cell receptor gene loci. Leukemia. 2003;17:738-745

3. Chin M, Mugishima H, Takamura M, et al: Hemophagocytic syndrome and hepatosplenic (gamma)(delta) T-cell lymphoma with isochromosome 7q and 8 trisomy. J Pediatr Hematol Oncol. 2004;26(6):375-378

Method Description
Describes how the test is performed and provides a method-specific reference

This test is performed using commercially available  and laboratory-developed  probes. Rearrangements involving TCL1A and TRAD are detected using a dual-color break-apart strategy probe. Trisomy of chromosome 8 and isochromosome 7q are detected using enumeration strategy probes. For each probe set, 100 interphase nuclei are scored. All results are expressed as the percent abnormal nuclei.(Unpublished Mayo method)

PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information

No

Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.

Monday through Friday

Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.

7 to 10 days

Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

4 weeks

Performing Laboratory Location
Indicates the location of the laboratory that performs the test

Rochester

Fees
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.

  • Authorized users can sign in to Test Prices for detailed fee information.
  • Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
  • Prospective clients should contact their account representative. For assistance, contact Customer Service.

Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.

CPT codes are provided by the performing laboratory.

88271x2, 88275 x1, 88291x1- FISH Probe, Analysis, Interpretation; 1 probe set

88271x2, 88275 x1 - FISH Probe, Analysis; each additional probe set (if appropriate)

LOINC® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.

Test Id Test Order Name Order LOINC Value
TLPMF T-cell Lymphoma B/BM, Spec FISH 101682-3
Result Id Test Result Name Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
614348 Result Summary 50397-9
614349 Interpretation 69965-2
614350 Result Table 93356-4
614351 Result 62356-1
GC141 Reason for Referral 42349-1
GC142 Probes Requested 78040-3
GC143 Specimen 31208-2
614352 Source 31208-2
614353 Method 85069-3
614354 Additional Information 48767-8
614355 Disclaimer 62364-5
614356 Released By 18771-6

Test Setup Resources

Setup Files
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.

Excel | PHP Pdf | CMS Pdf

Sample Reports
Normal and Abnormal sample reports are provided as references for report appearance.

Normal Reports | Abnormal Reports

SI Sample Reports
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.

SI Normal Reports | SI Abnormal Reports