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Home Page > Diseases by Region: Ashkenazi > Bloom's Syndrome

Bloom's Syndrome
by Yael Rosenberg, RN

Bloom's Syndrome is an autosomal recessive genetic disorder which is the result of the mutation of the BLM gene located on chromosome 15. BLM mutations prevent protein from carrying out its normal function of maintaining gene stability. Individuals with Bloom's Syndrome have an unusually high number of breaks along their chromosomes. This impairs the normal activities of cells causing the many health problems characteristic of this condition.

Affected Individuals, who have Bloom's Syndrome, typically have the following physical characteristics:
     •  Short stature
     •  A narrow face with prominent nose
     •  Skin color changes in the face. Change more noticeable after sunlight exposure
     •  Butterfly-shaped facial rash, similar to rash caused by Lupus Erythematosis
     •  A high pitched voice
     •  An increased susceptibility to infections and respiratory illness
     •  An increased susceptibility to cancer and leukemia
     •  Some may also have mental retardation

Males with Bloom's Syndrome are usually infertile, and some women with Bloom’s Syndrome have fertility problems.  

Incidence and Carriers
Disease Frequency:  Unknown
                                 Approx. 1 in 48,000 Ashkenazi Jews (about 1/3 of individuals affected worldwide)

Carrier Frequency: 1 in 110 Ashkenazi Jews

There is no treatment for the underlying cause of Bloom’s syndrome, and therefore medical intervention is primarily preventative. Adults with Bloom’s syndrome should be more attentive and cautious than others in their surveillance for cancer. It is recommended that people afflicted by this disease maintain close contact with a physician familiar with Bloom’s. This way, with the doctor’s assistance, pay attention to in case of an emergence of symptoms that may signal or indicate a treatable pre-cancerous condition.

Diagnosis: by clinical features and confirmed by chromosome analysis.

Carrier-Screening: This test requires a sample of blood. The tests can determine whether or not a gene change is present in the gene for Bloom's Syndrome. It is possible to detect the specific gene change that is seen in Ashkenazi Jews with Bloom Syndrome. The test is not as accurate for individuals who are from other ethnic background.

Prenatal-Screening: This can be attained with the use of CVS (chorionic villus sampling) or amniocentesis, which are performed early in the pregnancy.

Laboratories and Screening
The following laboratories offer genetic testing for Bloom's Syndrome:
   •  United States
   •  Israel
   •  Canada
   •  Europe

ARUP Laboratories
500 Chipeta Way
Salt Lake City, UT 84108-1221
Phone: (800) 522-2787
Fax: (800) 522-2706

Baylor College of Medicine
Medical Genetics Laboratories
One Baylor Plaza, NAB 2015
Houston, TX 77030
Phone: (800) 411-GENE (4363)
Fax: (713) 798-2787
Client Services Manager
Alejandra Quick
Phone: (713) 798-7656
Fax: (713) 798-2787

Boston University School of Medicine- Human Genetics
700 Albany Street
Suite 408
Boston, MA 02118-2394
Phone: (617) 638-7083
Fax: (617) 638-7092

1212 Rte 25A
Stony Brook, NY 11790
Phone: (888) GENE-MED

Denver Genetic Laboratories
UCD DNA Diagnostic Laboratory
12800 East 19th Avenue
Mail Stop 8313
Aurora, CO 80045
Phone: (303) 724-3801 (Main laboratory)
Fax: (303) 724-3802 (HIPAA-secure)

Detroit Medical Center University Laboratories
University Health Center
4201 St. Antoine
Suite 3E-1
Detroit, Michigan 48201
Phone: (313) 993-2631
Fax: (313) 993-2658

Emory University School of Medicine
Emory Molecular Genetics Laboratory
Atlanta, GA
Telephone: (404) 778-8500
Fax: (404) 778-8559

207 Perry Parkway
Gaithersburg, MD 20877
Phone: (301) 519-2100
Fax: (301) 519-2892

Genzyme Genetics General Inquiries:
Phone: (800) 357-5744
Fax: (508) 389-5549
Client Services - Reproductive Genetics
Phone: (800) 848-4436

Hartford Hospital
Newington, CT
Phone: (860) 545-3409
Fax: (860) 545-3733

1912 Alexander Drive
Research Triangle Park, NC 27709
Phone: (800) 345-4363
Fax: (919) 361-7798

Mayo Medical Laboratories
3050 Superior Drive NW
Rochester, MN 55901
Phone: (800) 533-1710
Phone: (507) 266-5700
Fax: (507) 284-4542

Mount Sinai Genetic Testing Laboratory (DNA Division)
The Mount Sinai Medical Center
One Gustave L. Levy Place
New York, NY 10029-6574
Phone: (212) 241-3055
Fax: (212) 241-9467

New Jersey Medical School
Institute of Genomic Medicine
University Hospital
150 Bergen Street, F Level,
Room F342
Newark, NJ 07103
phone: (973) 972-3170
Fax: (973) 972-0795

NYU Langone Medical Center
Human Genetics Program
550 First Avenue, Room MSB 136
New York, NY 10016
Phone: (212) 263-5746
Fax: (212) 263-7590

OHSU Oregon Health & Science University
Laboratory Services L471
3181 S.W. Sam Jackson Park Road
Portland, OR 97239
Phone: (503) 494-5400
Fax: (503) 494-6922

Molecular Diagnostics and BioBanking
3700 Downwind Drive
Marshfield, Wisconsin 54449 USA
Phone: (715) 387-0484
Fax: (715) 384-3661

Quest Diagnostics-Nichols Institute
Molecular Genetics Laboratory
Medical Director, Charles Strom, MD, PhD
33608 Ortega Highway
San Juan Capistrano, CA 92690
Contact: Joy Redman, MS, Genetic Counselor
Phone: (949) 728-4279
Fax: (949) 728-4874

Thomas Jefferson University
Lysosomal Diseases Testing Laboratory
Philadelphia, PA
Phone: (215) 955-1666
Fax: (215) 955-9554

UCLA Diagnostic Molecular Pathology Laboratory
11633 San Vicente Blvd.,
Los Angeles, CA 90049
Phone: (310) 794-2781
Fax: (310) 794-2765

UC – San Diego Medical Genetics
University of California San Diego
Division of Medical Genetics (MC 0639)
9500 Gilman Dr.
La Jolla, CA 92093-0639
Phone: (858) 534-3093
Fax: (858) 534-0269

The Victor Center for Jewish Genetic Diseases
Albert Einstein Medical Center
5501 Old York Road, Levy 2 West
Philadelphia, PA 19141
Phone: (215) 456-8722

Victor Outreach and Screening Program for Ashkenazi Jewish Genetic Diseases
Floating Hospital for Children at Tufts Medical Center
800 Washington Street, Box 340
Boston, MA 02111
Phone: (617) 636-7721
Fax: 617 636 0745

University of Miami Miller School of Medicine, Victor Program
Deborah Zimbalist Wasserman, M.S.
Genetic Counselor/Coordinator
Miami, Florida
Phone: (305) 243-4524
Cellular: (786) 897-9587

Assaf Harofeh Medical Center
Molecular Genetics Laboratory
Zerifin, Israel
Phone: (+972) 8-977-9617

[The] Bnai Zion Medical Center
The Simon Winter Institute for Human Genetics,
47 Eliyahu Golomb, Haifa , 33394
Phone: (+972) 4-835-9851, (+972) 4-835-9495

Carmel Medical Center
Molecular Genetics Laboratory
Michal Street , Haifa 34362
Phone: (+972)-4-8250407

Edith Wolfson Medical Center
Molecular Genetics Laboratory
Holon, Israel
Contact: Esther Leshinsky-Silver, PhD
Phone: (+972) 3-502-8692
Fax: (+972) 3-502-8543

Hadassah Hospital Hadassah Ein Karem
Human Molecular Genetic Laboratory
Dr. Israela (Issy) Lerer (Director)
POB 12000
Jerusalem 91120
Phone : (+972) 2-677-6016
Fax : (+972) 2-677-7499

Ha’Emek Medical Center
Molecular Genetics Unit
Afula 18101 , Israel
Phone: (+972) 4-6495416

Kaplan medical center, Molecular Genetics Laboratory
Rehovot, Israel
Phone: (+972) 8-944-1534

Meir Medical Center
Molecular Genetics Laboratory
Kfar Saba , Israel
Phone: (+972) 9-747-1059

Meuhedet Rosh Haayin
Molecular Genetics Laboratory.
Hey Beiyar 22 Rosh Haayin 48056 Israel
Phone: (+972) 3-9155330
Fax: (+972) 3-9155331

Pronto Diagnostic Ltd.
19A Habarzel Street
Ramat Hachayal
Tel Aviv, Israel 69710
Phone: (+972) 73-312-6155
Fax: (+972) 73-212-6144

Rabin Medical Center
Molecular Genetics
Petah Tikva, Israel
Director: Mordechai Shohat, MD
Genetic Counselor: Inbal Kedar, MSc
Phone: (+972) 3-937-7659
Fax: (+972) 3-937-7660

Rambam Medical Center, Molecular Genetics Laboratory
PO Box 9602 Haifa 31096 Israel
Phone: (+972)- 4-854-2456
Prof. Ruth Gershoni -Baruch

Sheba Medical Center
The Danek Gertner Institute Human Genetics
Molecular diagnosis Laboratory
Tel Hashomer; Ramat Gan . 52621, Israel
Phone: (+972)-3-530-3060

Soroka University Medical Center
Genetics Laboratories
Beer-Sheva , Israel
Phone: (+972)- 8-640-0258

Tel Aviv Sourasky Medical Center
Genetic Lab
Sourasky Builidng, 1st Floor, Wing 1
Tel Aviv, Israel
Phone: (+972) 3-697-4704
Phone: (+972) 3-697-3992
Fax: (+972) 3-697-4555

Western Galilee Hospital-Naharia
Molecular Genetics Laboratory
P.O.Box 21
Naharia 2100 Israel

The Hospital for Sick Children
Molecular Genetics Division
555 University Avenue
Room 3420, Hill Wing
Toronto, ON M5G 1X8 Canada
Tel: (416) 813-7200 ext. 1
Fax: (416) 813-7732

Division of Opmedic Group Inc.
1361 Beaumont Avenue
Suite 301
Mont-Royal (Quebec)
H3P 2W3
Phone: (514) 345-8535
Toll Free: (888) PROCREA
Contact: France Lagace
Phone: (514) 345-8535 ext 2234
Fax: (514) 345-8978

   •  Germany

Centogene GmbH
Schillingalee 68
18057 Rostock
Phone: (+49) 381-203652-0
Fax: (+49) 381-203652-19

Support Groups
The Milo Gladstein Foundation for Bloom's Syndrome 
7095 Hollywood Blvd #583  
Los Angeles CA 90028  

Chicago Center for Jewish Genetic Disorders 
Ben Gurion Way  
One South Franklin Street Fourth Floor  
Chicago IL 60606  
Phone: (312) 357-4718  
Fax: (312) 855-3295  

Xeroderma Pigmentosum Society, Inc (XP Society) 
XP Society has material on their site related to UV protection/avoidance. 
437 Syndertown Road  
Craryville NY 12521  
Phone: (877) XPS-CURE (877-977-2873)
Phone: (518) 851-2612  
Email: Email:  

Bloom's Syndrome Registry 
Cornell University Medical College  
1300 York Avenue  
New York NY 10021  
Phone: (212) 746-3956; (516) 678-5000x6217  

Bloom’s Connect



Jewish Genetic Disorders: A Layman's Guide: Guide to genetic disorders affecting  the Jewish population more than the non-Jewish. Includes basic facts on genetics & genetic disorders.
Books: Jewish Genetic Diseases

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