Mulibrey Nanism

National Organization for Rare Disorders, Inc.

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It is possible that the main title of the report Mulibrey Nanism is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.


  • Muscle-liver-brain Nanism
  • Perheentupa Syndrome
  • Pericardial Constriction and Growth Failure

Disorder Subdivisions

  • None

General Discussion

Mulibrey nanism is an extremely rare autosomal recessive genetic disorder characterized by profound growth delays and distinctive abnormalities of the muscles, liver, brain, and eyes. The acronym MULIBREY stands for (MU)scle, (LI)ver, (BR)ain, and (EY)e. Nanism is another word for dwarfism. A characteristic feature not included in the original acronym is the overgrowth of the fibrous sac that surrounds the heart restricting normal filling of the heart (constrictive pericarditis). Characteristic symptoms may include low birth weight, short stature, and severe progressive growth delays. Muscles are usually underdeveloped and lack normal tone (hypotonia). Some infants with this disorder may have an abnormally large liver (hepatomegaly). Infants typically have yellow discoloration in their eyes.

Supporting Organizations

American Heart Association

7272 Greenville Avenue
Dallas, TX 75231
Tel: (214)784-7212
Fax: (214)784-1307
Tel: (800)242-8721

Genetic and Rare Diseases (GARD) Information Center

PO Box 8126
Gaithersburg, MD 20898-8126
Tel: (301)251-4925
Fax: (301)251-4911
Tel: (888)205-2311

Human Growth Foundation

997 Glen Cove Avenue
Suite 5
Glen Head, NY 11545
Tel: (516)671-4041
Fax: (516)671-4055
Tel: (800)451-6434

Hydrocephalus Association

4340 East West Highway Ste 950
Bethesda, MD 20814
Tel: (301)202-3811
Fax: (301)202-3813
Tel: (888)598-3789

Hydrocephalus Support Group, Inc.

1933 Mistflower Glen Ct.
Chesterfield, MO 63005-4236
Tel: (636)532-8228
Fax: (314)251-5871

Little People of America, Inc.

250 El Camino Real Suite 201
Tustin, CA 92780
Tel: (714)368-3689
Fax: (714)368-3367
Tel: (888)572-2001

NIH/National Eye Institute

31 Center Dr
MSC 2510
Bethesda, MD 20892-2510
United States
Tel: (301)496-5248
Fax: (301)402-1065

For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to and click on Rare Disease Database under "Rare Disease Information".

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.

It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report

This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.

For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site or email

Last Updated:  12/30/1969
Copyright  2006 National Organization for Rare Disorders, Inc.