ARUP's Laboratory Test Directory

Achondroplasia Mutation, Fetal : 0051265
[ image for: Patient History for Fetal Molecular Testing]
Patient History for Fetal Molecular Testing
  


Mnemonic: AD PCR FE

Methodology: Polymerase Chain Reaction/Fluorescent Resonance Energy Transfer
Performed: Mon, Thu
Reported: 2-7 days
Specimen Required: Collect:  Cultured cells: Two T-25 flasks at 80% confluent of cultured amniocytes. Fill flasks with culture media to ship at 20-25°C. Backup culture must be retained at the client's institution until testing is complete. If the client  is unable to culture amniocytes, this can be arranged by contacting ARUP Client Services at (800) 522-2787.
Amniotic fluid:
10 mL unspun fluid at 20-25°C.  (Min: 5 mL)
Maternal sample:
One 5 mL whole blood, lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B) at 20-25°C.


Remarks:  Do not freeze.  Maternal specimen is recommended for proper testing interpretation.  Order Maternal Cell (MCC MAT) (0050608).

Unacceptable Conditions:  Whole blood or serum.

Stability:  Fetal: Ambient: 2 days; Refrigerated: 2 days; Frozen: Unacceptable
Maternal:
Ambient: 24 hours; Refrigerated: 5 days; Frozen: Unacceptable

Reference Interval:
By report
Interpretive Data: Interpretive Data: This test is performed pursuant to an agreement with Roche Molecular Systems, Inc.
Test Information:
Characteristics:
Short stature with disproportionately short arms and legs, a large head, usually normal life span and intelligence; increased risk for death in
infancy from compression of spinal cord and/or upper airway obstruction.
Incidence:
1:25,000
Inheritance:
Autosomal dominant; 80% arise from de novo mutations.
Methods:
PCR and fluorescent hybridization probes.
Limitations:
Mutations other than c.1138G>A and c.1138G>C will not be detected.
Analytical Sensitivity and Specificity:
Greater than 99%
Clinical Sensitivity:
Two mutations, c.1138G>A and c.1138G>C, in the FGFR3 gene account for greater than 99% of cases.





Please refer to Statement C in the Compliance Statements section in the front of the Laboratory Test Directory.
CPT Code(s): 83890 Isolation; 83898 Amplification; 83896 x2 Nucleic acid probes; 83912 Interpretation and report. FCC: 83900 Multiplex amplification; 83901 x14 Additional amplification; 83909 Capillary electrophoresis. MCC (0050608): 83890 Isolation; 83900 Amplification; 83901 x14 Amplification; 83909 Separation and identification; 83912 Interpretation and report.
 
 

 

 

 
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