Chromosome Analysis, Skin/Products of Conception


Abbrev Code:SKCHR   
Order Code:LAB4699Order Name:Chromosome Analysis, Skin/Products of Conception
Synonyms:Products of Conception, Chromosome Analysis, POC; CHROMO SK; G-band; Karyotype, Skin
Methodology:In-situ cell culture with chromosome analysis by G-banding.
CPT Codes: 88233 x1, 88262 x1, 88291 x1
Turnaround Time:Results are reported within 14-28 days.
Special Instructions:Test request form requires:
  • Gestational age
  • 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:Skin biopsy or Products of Conception (Chorionic Villi, fetal skin, placenta)
Optimal Volume:
  • Products of conception (POC): portion of placenta at least 1 cm3 containing 35-55 mg of Villi
  • Skin, cord or fetal tissue: 3-4 mm punch skin biopsy. If obtained at autopsy: at least 1 cm^3, including dermis
Minimum\Peds Volume:Products of conception (POC): 5-10 mg chorionic villi
Container:Plastic leakproof container, sterile
Collection Instructions:Collect in plastic leakproof sterile container containing RPMI media. Sterile saline may be used if RPMI is not available.


Processing and Shipping

Specimen Processing:Do not process. Store at room temperature or overnight in refrigerator at 4 degrees C. Do not freeze.
Specimens should be routed to the Pathology laboratory prior to Cytogenetics. Pathology will send sample to Cytogenetics.
Specimens must be received in the Cytogenetics laboratory Mon-Fri by 5:30 pm; weekends or holidays by 4:30 pm. Specimens received after these cutoffs 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)


Interpretive

Critical Range:


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