Days Set Up
Monday - Friday, 8:00am - 4:00pm. If necessary a STAT courier may be arranged for processing a sample on a priority basis. Call the laboratory at 763-5805 for additional information.
Analytic Time

7-10 days

MiChart Code
Cytogenetics, Chromosome Analysis/Karyotype, Bone Marrow
Soft Order Code

Test Updated:


Cytogenetics, Bone Marrow
Karyotype, Bone Marrow
Chromosome Analysis, Bone Marrow for Malignancy
Chromosome Analysis for Hematologic Disorders, Bone Marrow

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Unstimulated short term cell culture and chromosome analysis. Fluorescence In Situ Hybridization (FISH) when indicated.

Test Usage

Identification of specific chromosomal abnormalities associated with hematologic disease. Bone Marrow specimens are most commonly sent as part of the evaluation of acute leukemia (lymphoid or myeloid), MDS, or myeloproliferative disorders including chronic myelogenous leukemia, in the latter case to look for a Philadelphia chromosome.

Reference Range

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Chromosome Media tube. Sterile syringe rinsed with sodium heparin or green top vacutainer with sodium heparin. All pediatric bone marrow specimens and bone core biopsies must be transported in Chromosome Media available from Specimen Processing. Do not allow specimen to overheat or freeze. Clotted samples, samples containing <5 million dividing cells, and samples that are greater than 24 hours old are suboptimal. Please complete a MiChart test request and submit it with the specimen. A Cytogenetics Laboratory Requisition is available online at:….

Collection Offsite

Specimen transport should be arranged so that the specimen is received by MLabs the same day it is collected. Call for a STAT courier if necessary. Collect bone marrow using aseptic technique. Place 1 - 5 mL bone marrow aspirate in a green top (sodium heparin) tube. Invert the tube several times to prevent clotting. Send at room temperature as soon as possible. Do not allow specimen to overheat or freeze. Clotted samples, samples containing <5 million dividing cells, and samples that are greater than 24 hours old are suboptimal.

Normal Volume
3 - 5 mL bone marrow
Minimum Volume
1 mL bone marrow

Billing Information

CPT Code
88262 Chromosome Analysis, 88237 Tissue Culture
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.