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Karyotyping and FISH for Four Markers

Karyotyping and FISH for Four Markers

Karyotyping and Fluorescence In Situ Hybridization (FISH) for four markers are two genetic testing methods that analyze chromosomes for abnormalities. Karyotyping involves visualizing a person’s chromosomes under a microscope, while FISH uses fluorescent probes to detect specific genetic changes. When combined, these tests provide a comprehensive analysis of the chromosomes and are particularly helpful in diagnosing and managing various genetic disorders and cancers.

Karyotyping gives an overall view of the chromosomes, while FISH focuses on specific areas, usually where genetic changes are common. The combination of these two tests ensures that a broader range of chromosomal abnormalities can be detected, including changes that are not visible under a microscope through conventional karyotyping.


  • Test NameKaryotyping and FISH for Four Markers
  • Sample TypeBone marrow & Peripheral blood
  • Preparations RequiredNo specific preparation is needed for the patient as the sample is typically collected by a healthcare professional.
  • Report Time12 days

Why is the combination of Karyotyping and FISH important?

Karyotyping provides a broad view of the chromosomes, while FISH is more targeted. Combining these tests allows for a more comprehensive analysis, increasing the chances of detecting chromosomal abnormalities.

What preparations are needed for this test?

No specific preparations are needed. However, it is important to inform the doctor of any medications or supplements you are taking as they could affect the test results.

Home Sample Collection Process
1
Book your convenient slot
Book your convenient slot
2
Sample Collection by Phlebotomist
Sample Collection by Phlebotomist
3
Reporting of the sample at lab
Reporting of the sample at lab
4
Download Reports
Download Reports
Frequently Asked Questions

The sample may be collected as a blood sample, bone marrow sample, or tissue biopsy, depending on the condition being tested for.

Karyotyping can detect large chromosomal abnormalities such as additions, deletions, or rearrangements. FISH can detect smaller, more specific changes in DNA, such as mutations or translocations in four specific markers.

The results can guide treatment decisions by identifying specific genetic abnormalities. Certain abnormalities may suggest that a person is more likely to respond to a particular type of treatment.

This test is typically performed once to aid in the diagnosis of a genetic disorder or cancer. In certain cases, it may be repeated to monitor the progress of the disease or the effectiveness of treatment.

Normal values would indicate that the chromosomes have a typical structure with no noticeable abnormalities. Any significant deviations from the normal chromosomal structure may be considered abnormal.

There are no specific precautions after the test. However, patients should follow any instructions or recommendations given by their doctor based on the test results.

The quality of the sample and the techniques used in the laboratory can affect the results. Patient’s age, and history of exposure to certain chemicals or radiation can also affect chromosomal structure.

In the case of abnormal results, a geneticist or oncologist should be consulted for proper diagnosis and treatment planning.

FISH is more sensitive and can detect smaller genetic changes that might not be visible with traditional karyotyping. It's also faster and can be performed on non- dividing cells.

These tests can be used to diagnose a variety of conditions including Down syndrome, leukemia, lymphoma, and other genetic disorders and cancers.

Yes, the results can provide information on genetic disorders that can be inherited and help couples make informed decisions regarding family planning.

The turn-around time for these tests is typically 10-14 days, but this can vary depending on the laboratory.

Yes, these tests can be done during pregnancy using samples from amniotic fluid or chorionic villi to detect genetic abnormalities in the fetus.

Utilizing both Karyotyping and FISH for analyzing chromosomes provides a powerful tool for identifying chromosomal abnormalities. These tests are invaluable in diagnosing and managing genetic disorders and cancers. Based on the results, medical professionals can tailor treatment plans according to the specific genetic makeup of the disorder. If you have been recommended these tests, it is important to follow through and consult your doctor with the results to understand the next steps in the management or treatment of the condition.

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