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Genetic Information

Genetic Information

Discovery of genetic information in CdLS helps to better understand why, and how, CdLS happens, as well as why it varies so widely from one individual to another.

In 2004, researchers at the Children's Hospital of Philadelphia and the University of Newcastle upon Tyne (England), identified a gene (NIPBL) on chromosome 5 that causes CdLS when it is mutated. Since then, additional genes have been found (SMC1A, SMC3, HDAC8 and RAD21) that cause CdLS when changed. There are likely other genes as well. Researchers hope to gain a better understanding of why CdLS varies so widely from one individual to another and what can be done to improve the quality of life for people with the syndrome.

Why it's important to have found the gene changes that cause CdLS:

  • To help confirm diagnosis (although gene changes are not present in all patients).
  • To offer reassurance, through genetic testing, that other family members are not affected.
  • To provide accurate information and counseling resources for future pregnancies.
  • To understand the role(s) the gene changes play in development.
  • To improve existing therapies and design new ones.
  • To generate interest about the syndrome in the medical/scientific research community.

Suggested Reading:

Genetic testing for CdLS is offered only through the following facilities:

Children's Hospital of Philadelphia
(Research Lab currently providing testing to individuals whose previous blood test(s) didn't show changes in any identified genes, and for families with multiple cases of CdLS)

Sarah Noon, Genetic Counselor
3615 Civic Center Blvd.
ARC 1012
Philadelphia, PA 19104

Phone: (215) 590‐4248
Fax: (215) 590‐3850
Email: noons@email.chop.edu

View CHOP's web page »

Download CHOP's Center for Cornelia de Lange Syndrome and Related Diagnoses brochure

University of Chicago Genetic Services Laboratories
(Clinical Lab)

Maria Helgeson, MS, CGC
Certified Genetic Counselor
University of Chicago
5841 S Maryland Ave., MC 0077
Chicago, IL 60637
E-mail: mhelgeson@bsd.uchicago.edu.

Toll Free: (888) UC‐GENES
Local: (773) 834-0555
Fax: (773) 834‐0556

Email: ucgslabs@genetics.uchicago.edu
CLIA #: 14D0917593
CAP #: 18827‐49

View the University of Chicago's web page »


Courtagen can test for all five known CdLS genes as part of it neurodevelopment disorder panel. Financial assistance is available to qualified families.

CdLS Testing Information

12 Gill Street, Suite 3700
Woburn, MA 01801 
Phone: 877.395.7608
Fax: 617.892.7191
Web: www.courtagen.com.


Currently, GeneDx  offers testing for NIPBL and SMC1A gene changes.

CdLS Testing Information

207 Perry Parkway
Gaithersburg, MD 20877

Phone: 301-519-2100
Fax: 301-519-2892
Email: genedx@genedx.com
Web: www.genedx.com

Please note: individuals on medical assistance/medicare may not qualify for testing for Courtagen and GeneDx.


Emory Genetics Laboratory

Emory Genetics Laboratory offers testing for all five genes, separately or in a five-gene panel.

CdLS Testing Information

2165 North Decatur Road
Decatur, GA 30033

Phone: 855-831-7447
Fax: 404-778-8559 
Web: geneticslab.emory.edu/index.html.


Prevention Genetics

Prevention Genetics offers testing for all five genes, separately or in a eight-gene panel.

CdLS Testing Information

3800 South Business Park Ave.
Marshfield, WI 54449

Phone: 715-387-0484
Fax: 715-384-3661 
Web: www.preventiongenetics.com


Greenwood Genetic Center

CdLS Testing Information

106 Gregor Mendel Circle
Greenwood, SC 29646

Robin Fletcher, MS, CGC
Genetic Counselor

Office: 864-388-1055
Fax : 864 941-8133
Email: rfletcher@ggc.org 


Ambry Genetics

CdLS Testing Information

15 Argonaut
Aliso Viejo, CA 92656

Phone: 949-900-5500
Fax : 949-900-5501
Web: www.ambrygen.com