Ordering Recommendations

A completed test request form must be included with the specimen. Ensure that the following information is included on the test request form:
  • Clinical Indication
  • ICD-10 Diagnosis Code

NOTE: If available, results from a recent CBC are helpful for leukemic bloods

Performed

Monday - Friday

Methodology

Giemsa-Band Analysis

Reported

Routine: 5 - 10 days
Stat: 3 days (preliminary result)

Synonyms

  • Chromosomes
  • Chromosome Study
  • Karyotype, Leukemic Blood
  • Karyotype Analysis
  • Karyotyping
  • Giemsa Band Analysis
  • Giemsa-Band Analysis
  • G-Banding Analysis
  • Hematological Disorder Study
  • Hematologic Diseases
  • Oncology
  • Cancer
  • Cytogenetics Laboratory

Performing Lab

Cytogenetics / Cytogenomics

Turnaround Time

*These studies involve culturing of living cells; therefore, turnaround times given represent average times which are subject to multiple variables.

After specimen receipt, results are generally available as follows:
  • Average TAT: 7 days

Add-on Eligibility

Yes
*Add-on orders can be accepted for specimens already submitted to the Cytogenetics Lab for testing so long as the specimen or cell pellet is still available.

Specimen Type

Blood

Specimen Volume

3 mL (Minimum: 1 mL)
*This refers to specimen volume at collection prior to any processing

Collection Container

3.0 mL Sodium Heparin Tube (Green Top Vacutainer)

Unacceptable Conditions

Unacceptable Conditions:
Specimens are considered unacceptable and will be rejected if the following conditions apply:
  1. Specimens that have been frozen
  2. Unlabeled or mislabeled specimens

Suboptimal Conditions:
Culture and analysis will be attempted on specimens received under the following conditions, but results may be suboptimal:
  1. Clotted or grossly hemolyzed specimens
  2. Specimens that have been improperly collected, stored, or transported (unless listed above)
  • Specimens not received within 48 hours of collection
  • Specimens that have been refrigerated
  1. Specimens with insufficient volume for testing

Storage/Transport Temperature

*Send specimens to the lab as soon as possible after collection.  DO NOT hold specimens in the unit to send to the lab due to specimen stability.
 
Transport Instructions      
Collection Location Transport Temperature Processing Required Timeframe
ED/Inpatient Room Temperature None Specimen must be received by the lab ASAP or within 24 hours of collection
Laboratory/Outpatient/Off-Site Room Temperature None Specimen must be received by the lab ASAP or within 24 hours of collection

Storage: Room Temperature

Stability (from collection to initiation)

Stability:
  • Room Temperature: 24 hours
  • Refrigerated: Suboptimal, not recommended
  • Frozen: Unacceptable

Laboratory Storage: Refrigerated
Laboratory Retention: Until results have been finalized

Collection Instructions

Labeling Instructions:
When labeling blood tubes, leave a small window visible for the lab to assess the fill volume and sample integrity. Ensure that the barcode is in the correct orientation.


Collection Instructions:
Follow the correct order of draw when collecting with additional orders and tube types:
     

Special Processing Instructions After Hours

In case there is a test sample determined "STAT" by the ordering physician, genetic counselor, or provider to be routed to CALM Cytogenetics and it is outside regular business hours (after hours, holidays, or weekends) please contact:

NAME: Cytogenetics Team

PAGER: 619-290-8698

Please be aware that ALL neonatal testing ordered for Cytogenetics is considered "STAT" as well.

Point of contact (above) will follow up on cascading down information as needed.

Thanks for your cooperation.

Reference Interval

By Report

Interpretive Data

*Refer to report for result specific interpretation details.

Standard chromosome analysis may not detect small structural abnormalities and may not include metaphases from abnormal cell populations with low mitotic index or present at low frequency.
Ordering

Ordering Recommendations

A completed test request form must be included with the specimen. Ensure that the following information is included on the test request form:
  • Clinical Indication
  • ICD-10 Diagnosis Code

NOTE: If available, results from a recent CBC are helpful for leukemic bloods

Performed

Monday - Friday

Methodology

Giemsa-Band Analysis

Reported

Routine: 5 - 10 days
Stat: 3 days (preliminary result)

Synonyms

  • Chromosomes
  • Chromosome Study
  • Karyotype, Leukemic Blood
  • Karyotype Analysis
  • Karyotyping
  • Giemsa Band Analysis
  • Giemsa-Band Analysis
  • G-Banding Analysis
  • Hematological Disorder Study
  • Hematologic Diseases
  • Oncology
  • Cancer
  • Cytogenetics Laboratory

Performing Lab

Cytogenetics / Cytogenomics

Turnaround Time

*These studies involve culturing of living cells; therefore, turnaround times given represent average times which are subject to multiple variables.

After specimen receipt, results are generally available as follows:
  • Average TAT: 7 days

Add-on Eligibility

Yes
*Add-on orders can be accepted for specimens already submitted to the Cytogenetics Lab for testing so long as the specimen or cell pellet is still available.
Collection

Specimen Type

Blood

Specimen Volume

3 mL (Minimum: 1 mL)
*This refers to specimen volume at collection prior to any processing

Collection Container

3.0 mL Sodium Heparin Tube (Green Top Vacutainer)

Unacceptable Conditions

Unacceptable Conditions:
Specimens are considered unacceptable and will be rejected if the following conditions apply:
  1. Specimens that have been frozen
  2. Unlabeled or mislabeled specimens

Suboptimal Conditions:
Culture and analysis will be attempted on specimens received under the following conditions, but results may be suboptimal:
  1. Clotted or grossly hemolyzed specimens
  2. Specimens that have been improperly collected, stored, or transported (unless listed above)
  • Specimens not received within 48 hours of collection
  • Specimens that have been refrigerated
  1. Specimens with insufficient volume for testing

Storage/Transport Temperature

*Send specimens to the lab as soon as possible after collection.  DO NOT hold specimens in the unit to send to the lab due to specimen stability.
 
Transport Instructions      
Collection Location Transport Temperature Processing Required Timeframe
ED/Inpatient Room Temperature None Specimen must be received by the lab ASAP or within 24 hours of collection
Laboratory/Outpatient/Off-Site Room Temperature None Specimen must be received by the lab ASAP or within 24 hours of collection

Storage: Room Temperature

Stability (from collection to initiation)

Stability:
  • Room Temperature: 24 hours
  • Refrigerated: Suboptimal, not recommended
  • Frozen: Unacceptable

Laboratory Storage: Refrigerated
Laboratory Retention: Until results have been finalized

Collection Instructions

Labeling Instructions:
When labeling blood tubes, leave a small window visible for the lab to assess the fill volume and sample integrity. Ensure that the barcode is in the correct orientation.


Collection Instructions:
Follow the correct order of draw when collecting with additional orders and tube types:
     

Special Processing Instructions After Hours

In case there is a test sample determined "STAT" by the ordering physician, genetic counselor, or provider to be routed to CALM Cytogenetics and it is outside regular business hours (after hours, holidays, or weekends) please contact:

NAME: Cytogenetics Team

PAGER: 619-290-8698

Please be aware that ALL neonatal testing ordered for Cytogenetics is considered "STAT" as well.

Point of contact (above) will follow up on cascading down information as needed.

Thanks for your cooperation.
Result Interpretation

Reference Interval

By Report

Interpretive Data

*Refer to report for result specific interpretation details.

Standard chromosome analysis may not detect small structural abnormalities and may not include metaphases from abnormal cell populations with low mitotic index or present at low frequency.

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