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Chromatin Interphase Blood Marrow Fish Impedance Analysis (qualitative probe screening)

Published: August 9, 2026Updated: August 16, 2026

This test evaluates the presence of abnormal chromatin structures in cells from your bone marrow, often used to assess genetic or chromosomal abnormalities.

Quick summary

["This test helps detect potential genetic or chromosomal issues in blood cells."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
57802-1
Short code
Chrom analy interphase Bld/Mar FISH-Imp
Synonyms
Chrom analy interphase Bld/Mar FISH-Imp
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
fish
CPT
86038
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

Chromatin is the material within cells that holds genetic information. During interphase (a phase of cell growth), chromatin can appear in various forms. This test uses a specialized probe to detect unusual chromatin patterns, which may indicate genetic disorders or other cellular abnormalities. The method involves examining cells from your bone marrow under a microscope or through advanced imaging techniques to identify any irregularities in chromatin structure.

Why It Might Be Ordered

Your healthcare provider may order this test if you have symptoms or risk factors for genetic conditions, such as certain cancers (e.g., leukemia), inherited disorders, or unexplained blood abnormalities. It can also be part of a diagnostic workup for conditions affecting bone marrow function.

Sample Collection and Preparation

A small amount of bone marrow will be collected during a procedure called a bone marrow aspiration or biopsy. This is typically done under local anesthesia. The collected cells are then processed and analyzed to examine chromatin structure. The test may require additional preparation, such as staining cells to highlight specific features under a microscope.

What to Expect Before the Test

You may need to avoid certain medications or supplements that could interfere with the test results. Inform your healthcare provider about all medications, including over-the-counter drugs or herbal products, you are taking. Follow any specific fasting or preparation instructions provided by your lab or doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

Abnormal chromatin patterns detected in this test can suggest genetic mutations, chromosomal abnormalities, or other underlying conditions affecting cell division and function. For example, certain chromatin changes are linked to cancers like leukemia or inherited disorders such as Down syndrome. Early detection can guide treatment decisions and improve management of these conditions.
This test is primarily qualitative and used as a screening or confirmatory tool rather than a quantitative measure. Results may require further genetic testing or additional clinical correlation to determine the exact cause of observed abnormalities.
How long will it take to get my results?
Results from this test can vary depending on the complexity of the analysis. Some providers may report findings within a few days to a couple of weeks, while more detailed evaluations may take longer. Follow up with your healthcare provider for a detailed interpretation of your results.
Can I fast before this test?
No fasting is typically required for this test since it involves bone marrow sampling rather than blood or urine collection. However, always confirm with your healthcare provider or lab technician for specific instructions tailored to your situation.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy