Acromesomelic dysplasia, Maroteaux type (AMDM; MIM 602875) is an autosomal recessive skeletal dysplasia caused by loss of function mutations in the natriuretic peptide receptor B gene (NPR2).  Birth length and weight are normal in most infants but skeletal growth falls off sharply.  By 1-2 years of age, diagnostic skeletal changes are present and consist of short and misshapen bones of the limbs and spine, and abnormal growth plates.  Adultread more

Tests Available

By gene: NPR2
Next Generation Sequencing
Test Code: 1010
Deletion / Duplication
Test Code: 1011
NGS/Del Dup Comprehensive
Test Code: 1447

Test Details

Technical Information
Disease Groups: 
Skeletal Dysplasias
CPT Codes: 
81479 x 1
Turnaround Time: 
Typically 2 to 4 weeks from receipt of a sample in the laboratory. All cases involving ongoing pregnancies will be expedited.
Non-Prenatal Specimens: 
  1. Whole blood: purple-top (EDTA) tube, minimum of 3 ml
  2. Genomic DNA: a minimum of 3 µg (at a concentration of at least 30 ng/µl)
  3. Fibroblasts: 2 confluent T-25 flasks
  4. Saliva: only samples collected in Oragene DNA Self-Collection Kit or Oragene Saliva Collection Kit for Young Children are accepted
Prenatal Specimens: 
  1. Cultured cells: 2 confluent T-25 flasks derived from amnio or CVS samples
  2. Genomic DNA: a minimum of 3 µg (at a concentration of at least 30 ng/µl)
Ship all specimen types at room temperature by overnight courier. Do not freeze.

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