Test Directory

Test Code
5096
Test Name
Multiple Epiphyseal Dysplasia (MED) NGS Panel
CPT Codes
81479
Expected Turnaround Time
Typically 2 to 4 weeks from receipt of a sample in the laboratory. All cases involving ongoing pregnancies will be expedited.
Clinical Utility
Genetic analysis to provide a molecular diagnosis of this disorder. Recommended for individuals with a personal and/or family history of this disorder to ensure appropriate treatment and establish recurrence risk for family members.
Specimen and Container Info

Non-Prenatal Specimens

Preferred/Alternate

Specimen Type

Containers

Volume

Preferred Specimen Type

Whole Blood

Lavender Top (EDTA)

3 mL

Alternate Specimen Type

Genomic DNA

1.5 mL Tube

3 µg (at a concentration of at least 30 ng/µl), preferably in TE solution.

Alternate Specimen Type

Fibroblasts

T-25 Flasks

2 confluent T-25 flasks, filled to capacity

Alternate Specimen Type

Saliva (Whole blood is recommended for CNV)

DNA Self-Collection Kit or Oragene Saliva Collection Kit for Young Children

Follow kit instructions (www.dnagenotek.com)

Prenatal Specimens

Either specimen type below is acceptable.

Specimen Type

Containers

Volume

Cultured cells

T-25 Flasks

2 confluent T-25 flasks derived from amnio or CVS samples.

Genomic DNA

1.5 mL Tube

3 µg (at a concentration of at least 30 ng/µl), preferably in TE solution.

NOTE: For specimens from outside of North America, the preferred specimen type is Genomic DNA. HNL Genomics does not recommend shipping whole blood or cultured cells from any location other than the United States, Canada, or Mexico.

Transport Instructions
  • Transport at room temperature within 24 hours.
  • If the specimen cannot be transported to the lab within 24 hours, refrigerate for up to 72 hours.
  • Do not freeze or expose to extreme temperatures, refrigerate for up to 72 hours if cannot be transported to lab within 24 hours. 
Stability Requirements

Room Temperature

24 hours

Refrigerated

72 hours

Causes for Rejection
  • Improperly labeled specimen (minimum of two patient identifiers)
  • Inappropriate specimen type
  • Incomplete or incorrect test request form
  • Insufficient volume
  • Specimen has leaked in transit
  • Specimen without a test order
Methodology
Next Generation Sequencing and Copy Number Variation Analysis
Performing Location
Genomics - Snowdrift
Alternate Names
MED
Description

Multiple epiphyseal dysplasia (MED) is a clinically and genetically heterogeneous chondrodysplasia with either autosomal dominant or recessive inheritance. The phenotypic spectrum ranges from mild to severe. Patients usually present with joint pain and stiffness, waddling gait and/or mild short stature in childhood. Some patients, however, remain asymptomatic until adult age and present with early-onset osteoarthritis of the large weight-bearing joints. Typical radiographic findings include delayed and irregular ossification of the epiphyses in multiple joints. Spinal changes, if present, are mild.

The MED panel consists of eight genes: CANT1, COL2A1, COMP, COL9A1, COL9A2, COL9A3, MATN3 and SLC26A2.

 

Gene

Disorder

MIM

Inheritance

CANT1

Epiphyseal dysplasia, multiple, 7 (EDM7)

617719

AR

COL2A1

Avascular necrosis of femoral head, primary (ANFH1)

Legg-Calve-Perthes disease (LCPD)

Osteoarthritis with mild chondrodysplasia (OSCDP)

608805

150600

604864

AD

AD

AD

COL9A1

Epiphyseal dysplasia, multiple, 6 (EDM6)

614135

AD

COL9A2

Epiphyseal dysplasia, multiple, 2 (EDM2)

600204

AD

COL9A3

Epiphyseal dysplasia, multiple, 3 (EDM3)

600969

AD

COMP

Epiphyseal dysplasia, multiple, 1 (EDM1)

132400

AD

MATN3

Epiphyseal dysplasia, multiple, 5 (EDM5)

607078

AD

SLC26A2

Epiphyseal dysplasia, multiple, 4 (EDM4)

226900

AR

Testing Schedule
Monday-Friday
Genes
CANT1, COL2A1, COL9A1, COL9A2, COL9A3, COMP, MATN3, SLC26A2
MIM
132400, 150600, 226900, 600204, 600969, 604864, 607078, 608805, 614135, 617719
Disease Group
Skeletal Disorders