Ordering Information

Epic Orderable Name:  Prenatal DiGeorge FISH

Epic Test Id:  LAB20788

Testing Includes:  Analysis of metaphase cells using FISH with probes for DiGeorge Syndrome region (22q11)

Aliases:  Digeorge, FISH, 22q11, prenatal, Cytogenomics, Cytogenetics, Cytogenetic analysis

Testing Schedule:  Monday thru Friday: 8:30 AM to 5 PM

Turnaround Time:  10-14 Days

Order Priorities:  Routine

Methodology:  Fluorescence Insitu Hybridization (FISH)

Ordering Restrictions:  Chromosome analysis or microarray must be ordered to perform this test

Specimen Requirements

Specimen
     Villi
          - Minimum 25 mg of villi required; place in transport media provided; store at room temperature - DO NOT FREEZE
          - DO NOT PLACE in FORMALIN
          - Contact the Laboratory for transport media if necessary
    
    Amniotic Fluid
          -Minimum 30 mL amniotic fluid required; store at room temperature - DO NOT FREEZE
          - Use multiple 15 mL centrifuge tubes or contact the lab for a sterile container.

Collection Container:  Sterile Container

Specimen Stability:  Store at room temperature - DO NOT FREEZE

Specimen Types: Chorionic Villi, Amniotic Fluid       

For Lab Staff

Lab Notes: 

• Contact the Laboratory to arrange specimen delivery (tube to station 072, courier delivery or lab pick up).
• Lab specimen shipping address - deliver to:
       Johns Hopkins Cytogenomics/Cytogenetics Lab
       600 N Wolfe Street
       Baltimore, MD 21287
• LAB phone: 410-955-3476; specimens will be received M-F, between 8am and 4:30pm
• Chromosome analysis or microarray is required to accompany this FISH test.
• Storage: room temperature - DO NOT FREEZE
• Results in EPIC under Lab Results
• Downtime: Use the Prenatal Laboratory form