FISH (Fluorescent in Situ Hybridization) Locus Specific

Abbrev Code:FISHCG   
Order Code:LAB4736Order Name:FISH
Synonyms:LAB1402; Prader-Willi/Angelman, Williams Syndrome, DiGeorge, Cri-du-chat; FISH Metaphase, Constitutional, Congenital
Methodology:FISH Locus Specific
CPT Codes: 88273 x1, 88271 x1, 88291 x1, 88230 x1
Turnaround Time:Results are reported within 7-21 days.
Special Instructions:Consultation must occur with Cytogenetics Lab (612-273-3171) prior to order. Charges will vary with type of probe required, as determined by Cytogenetics Lab. Each probe ordered will accrue a probe and analysis charge.

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 genetic counselor, and contact numbers
  • 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
Optimal Volume:5 mL in green (sodium heparin, no gel)
Minimum\Peds Volume:3 mL in green (sodium heparin, no gel)
Container:Green (sodium heparin, no gel)
Causes for Rejection:Clotted or frozen specimen. Incorrect specimen collection tube (anticoagulant).

Processing and Shipping

Specimen Processing:Store at room temperature. Do not refrigerate or freeze. Do not process.
Specimens must be received in the Cytogenetics Laboratory Mon-Fri by 5:30 pm. Weekends and holidays by 4:30 pm. Specimens received after these cutoffs will be processed the following day.
Shipping Instructions:Ship at room temperature.
For optimal testing results the specimen must arrive within 24 hours


Test Performed at or Referral Lab Cytogenetics  (UMMC East Bank)

Click HERE to Report test errors or omissions.
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