FISH, MALT Lymphoma, MALT1, 18q21 Rearrangement

Test Code

40053

CPT Codes
88271 (x2), 88275

Includes

If results are not possible, the test order may be canceled and replaced by a Cytogenetics Communication

Preferred Specimen

5 mL whole blood collected in a sodium heparin (green-top) tube, or
3 mL bone marrow collected in a sodium heparin (green-top) tube

Minimum Volume

1 mL

Other Acceptable Specimens

Formalin-fixed, paraffin-embedded tissue • 5x5 mm lymph node tissue or lymph node collected in a sterile container in Hank's Ringer's solution or culture medium with antibiotics

Instructions

Clinical history and reason for referral are required with test order. Prior therapy and transplant history should be provided with test order.

For bone marrow (1-3 mL) or whole blood (3-5 mL) use sodium heparin (green-top) tube. For lymph node biopsy 5X5 mm in a sterile container in Hank's Ringer's solution or culture medium with antibiotics. Transportation medium available upon request. Formalin-fixed, paraffin-embedded tissue.

Transport Temperature

Room temperature

Specimen Stability

Specimen viability decreases during transit. Send specimen to testing lab for viability determination. Do not freeze. Do not reject.

Methodology
Fluorescence in situ Hybridization (FISH)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Sun-Fri; Report available: 5 days

Reference Range

See Laboratory Report

Clinical Significance

The extra-nodal marginal zone B-cell lymphoma (MZBCL) of mucosa associated lymphoid tissue (MALT) type, which comprises 7% of all non-Hodgkin lymphomas, is an indolent disease, involving most often the stomach, but it may also localize in the lung, the thyroid, the salivary gland, and the orbit. Two common translocations in this lymphoma are the t(11;18)(q12;q21) (20-50% of cases) and the t(14;18)(q32;q21) (10-20% of cases). This break apart 18q21 probe is able to detect either of these translocations.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.