EHA Library - The official digital education library of European Hematology Association (EHA)

CROSS-SECTIONAL ANALYSIS OF CONCORDANCE RATES BETWEEN KARYOTYPING AND RT-PCR IN ACUTE MYELOID LEUKEMIA; REAL WORLD CHALLENGES
Author(s): ,
Deeksha Katoch
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
,
Yanamandra Uday
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
,
Tarun Verma
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
,
Rajan Kapoor
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
,
S Das
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
Velu Nair
Affiliations:
Hematology,Army Hospital (Research & Referral),Delhi,India
(Abstract release date: 05/18/17) EHA Library. Katoch D. 05/18/17; 182417; PB1703
Deeksha Katoch
Deeksha Katoch
Contributions
Abstract

Abstract: PB1703

Type: Publication Only

Background
Translocation and chromosomal anomalies have prognostic implications in acute myeloid leukemia (AML). Cytogenetic analysis assumes great importance in their diagnosis and treatment stratification which are assessed by karyotyping and/or reverse transcriptase polymerase chain reaction (RT-PCR). Given the dependency of karyotyping on sample quality, more and more centers are now relying on RT-PCR to detect specific translocations. Varying rates of concordance between Karyotyping and RT-PCR have been reported and no consensus has prevailed. Given the resource constraint, it is economically non-viable to perform both for prognosis in real world scenarios. In addition, the cost of the extra tests also adds to the burden of healthcare economy.

Aims
In 132 patients of AML, we aimed at determining the incidence of cytogenetic abnormalities and molecular anomalies detected by Karyotyping and RT-PCR respectively. Concordance rates between conventional cytogenetic tests and RT-PCR were also calculated.

Methods
We conducted a retrospective analysis on the medical records of 132 patients of AML at a tertiary health care facility in India, treated during 2010-2017. Results from commercially available molecular assays for detection of specific translocations by RT-PCR and of adequate samples of karyotype analysis were compared.

Results

In AML patients, out of those tested 50.6% had chromosomal aberrations detected by karyotyping while 30% had a positive detection with RT-PCR. The concordance rate in AML was found to be 56.3%. In a large number (31 in AML) karyotyping provided additional information in the form of detection of deletions, additions and hyper-diploidy.

Conclusion

RT-PCR cannot substitute conventional cytogenetic analysis due to the absence of a broad based application for detection of aberrations other than translocations. However, given its efficiency and reliability it can have a complimentary role in prognosis assessment.

Session topic: 4. Acute myeloid leukemia - Clinical

Keyword(s): RT-PCR, Cytogenetic abnormalities, AML

Abstract: PB1703

Type: Publication Only

Background
Translocation and chromosomal anomalies have prognostic implications in acute myeloid leukemia (AML). Cytogenetic analysis assumes great importance in their diagnosis and treatment stratification which are assessed by karyotyping and/or reverse transcriptase polymerase chain reaction (RT-PCR). Given the dependency of karyotyping on sample quality, more and more centers are now relying on RT-PCR to detect specific translocations. Varying rates of concordance between Karyotyping and RT-PCR have been reported and no consensus has prevailed. Given the resource constraint, it is economically non-viable to perform both for prognosis in real world scenarios. In addition, the cost of the extra tests also adds to the burden of healthcare economy.

Aims
In 132 patients of AML, we aimed at determining the incidence of cytogenetic abnormalities and molecular anomalies detected by Karyotyping and RT-PCR respectively. Concordance rates between conventional cytogenetic tests and RT-PCR were also calculated.

Methods
We conducted a retrospective analysis on the medical records of 132 patients of AML at a tertiary health care facility in India, treated during 2010-2017. Results from commercially available molecular assays for detection of specific translocations by RT-PCR and of adequate samples of karyotype analysis were compared.

Results

In AML patients, out of those tested 50.6% had chromosomal aberrations detected by karyotyping while 30% had a positive detection with RT-PCR. The concordance rate in AML was found to be 56.3%. In a large number (31 in AML) karyotyping provided additional information in the form of detection of deletions, additions and hyper-diploidy.

Conclusion

RT-PCR cannot substitute conventional cytogenetic analysis due to the absence of a broad based application for detection of aberrations other than translocations. However, given its efficiency and reliability it can have a complimentary role in prognosis assessment.

Session topic: 4. Acute myeloid leukemia - Clinical

Keyword(s): RT-PCR, Cytogenetic abnormalities, AML

By clicking “Accept Terms & all Cookies” or by continuing to browse, you agree to the storing of third-party cookies on your device to enhance your user experience and agree to the user terms and conditions of this learning management system (LMS).

Cookie Settings
Accept Terms & all Cookies