Limited G-Band Chromosome Analysis


Abbrev Code:LTDHR   
Order Code:LAB6603Order Name:Limited G-Band Chromosome Analysis
Synonyms:LTD-HR; G-Bands; Karyotype; Limited G Band Analysis; Limited Chromosomes
Methodology:Chromosome analysis by G-banding
CPT Codes: 88261 x1, 88230 x1, 88291 x1, 88237 x1
Turnaround Time:Performed Monday-Saturday; results are reported within 7-21 days.
Special Instructions:Limited G-band Chromosome Analysis should be ordered if requested by the Cytogenetics Laboratory or if a previous Microarray (CMA) study was completed in the Cytogenetics Laboratory on the patient. This test is not sufficient as a stand-alone test under routine circumstances:
Test request form requires:
  • Date and time of specimen collection
  • Specimen type
  • Patient information: date of birth, sex and medical record number
  • Ordering physician and contact number
  • Reason for referral
  • Clinical status
  • Information regarding medications or transfusions
  • Previous or pending genetic testing results

A signed informed consent in the patient's medical record is required. The consent should not be sent to the laboratory. A link to the Genetic Testing Consent Form is provided as a convenience for the providers and genetic counselors. See Associated Links.
Associated Links:

Genetic Testing Consent Form


Collection Instructions

Specimen:Whole blood or bone marrow
Optimal Volume:Whole Blood: 10 mL in green (sodium heparin, no gel).
Bone Marrow: 5 mL aspirate in a dry heparin syringe.
Minimum\Peds Volume:Whole Blood: 5 mL in green (sodium heparin, no gel). 1-3 mL is acceptable for infants or children.
Bone Marrow: 3 mL aspirate in a dry heparin syringe.
Container:Green (sodium heparin, no gel)
Alternate Containers: Dry heparin syringe
Causes for Rejection:Clotted or frozen sample. Incorrect specimen collection tube (anticoagulant).


Processing and Shipping

Specimen Processing:Do not process. Store at room temperature. Do not refrigerate or freeze.
Specimens must be received in the Cytogenetics Laboratory Monday - Friday, weekends and holidays between 8:00 am and 5:00 pm. Specimens received after the cutoff will be processed the following day.
Shipping Instructions:Ship at room temperature.
Stability:For optimal testing results the specimen must arrive within 24 hours.
Test Performed at or Referral Lab Cytogenetics  (UMMC East Bank)


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