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Test Code
2338
Test Name
Mowat-Wilson Syndrome
CPT Codes
81404, 81405
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
MOWS
Description

Mowat-Wilson syndrome (MOWS; MIM  235730) is an autosomal dominant developmental disorder. Major clinical features include severe mental retardation, distinctive facial dimorphism, microcephaly, seizures and Hirschsprung disease (HSCR). Facial features include square-shaped face with deep-set, widely spaced eyes, broad nasal bridge with a rounded nasal tip and a prominent pointed chin. Affected people tend to have %u201CAngelman- like%u201D smiling and an open-mouthed expression. Other features of MOWS include short stature, congenital heart defects, abnormalities of the urinary tract and genitalia. In some cases, this condition also affects the eyes, teeth, hands, and skin pigmentation. It is caused by mutations in the ZEB2 gene, which codes for zinc finger E-box-binding homeobox 2. It is a DNA-binding transcriptional repressor that interacts with activated SMADs. MOWS has many overlapping clinical features with Goldberg-Shprintzen syndrome (GOSHS; MIM 609460), which is caused by mutations in the KIAA1279 gene. 
Testing Schedule
Monday-Friday
Genes
ZEB2
Disease Group
Craniosynostosis and Craniofacial Disorders, Neuromuscular
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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