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- $Unique_ID{BRK03745}
- $Pretitle{}
- $Title{Floating-Harbor Syndrome}
- $Subject{Floating-Harbor Syndrome FHS Dubowitz Syndrome Russell-Silver
- Syndrome Three M Syndrome}
- $Volume{}
- $Log{}
-
- Copyright (C) 1993 National Organization for Rare Disorders, Inc.
-
- 934:
- Floating-Harbor Syndrome
-
- ** IMPORTANT **
- It is possible that the main title of the article (Floating-Harbor
- Syndrome) is not the name you expected. Please check the SYNONYMS listing to
- find the alternate name and disorder subdivisions covered by this article.
-
- Synonyms
-
- FHS
-
- Information on the following diseases can be found in the Related
- Disorders section of this report:
-
- Dubowitz Syndrome
- Russell-Silver Syndrome
- Three M Syndrome
-
- General Discussion
-
- ** REMINDER **
- The Information contained in the Rare Disease Database is provided for
- educational purposes only. It should not be used for diagnostic or treatment
- purposes. If you wish to obtain more information about this disorder, please
- contact your personal physician and/or the agencies listed in the "Resources"
- section of this report.
-
- Floating-Harbor Syndrome is a very rare disorder characterized by short
- stature, delayed language skills, and a triangular shaped face. A broad
- nose, deep-set eyes and a wide mouth with thin lips give the affected patient
- a distinct appearance. FHS was named for the first two patients who were
- seen at Boston Floating Hospital and Harbor General Hospital in California.
- The cause of this disorder is not known.
-
- Symptoms
-
- Floating-Harbor Syndrome is a very rare disorder in which the affected
- patient has short stature with delayed bone growth, a delay in expressive
- language, and distinct facial features.
-
- Growth may be affected prenatally but typically becomes apparent during
- the first year of life. All patients with FHS have a delay in bone age which
- means that the rate of growth and development of the bones is slower than
- normal. The limbs and trunk are in proportion while the head may appear
- relatively large.
-
- Delayed expressive language is found in all patients with FHS. Some
- children may be delayed in their learning ability as well. Most children
- appear to be slightly behind in school but there have been no recorded cases
- of moderate or severe retardation.
-
- Distinctive facial features are another symptom of Floating-Harbor
- Syndrome. These features typically become apparent at the age of three or
- four years. The nose and nasal bridge are broad, and the mouth is wide with
- thin lips. The eyes are deeply set and the face appears small with a
- triangular shape. Eyelashes may be longer than normal, and there may be
- dental abnormalities.
-
- Abnormal bending (clinodactyly) of the fifth finger, clubbing of the
- fingers and/or excessive body hair (hirsutism) have been found in some
- patients with Floating-Harbor Syndrome.
-
- An intestinal malabsorption disorder caused by intolerance to gluten
- (Celiac Sprue) has been found in several patients with this disorder. (For
- more information on this disorder choose "Celiac Sprue" as your search term
- in the Rare Disease Database). An additional thumb, constipation and/or a
- narrowing of the opening of the right ventricle into the pulmonary artery
- (pulmonary stenosis) have also been found in several affected patients.
-
- Causes
-
- The exact cause of Floating-Harbor Syndrome is not known. There have been no
- reported cases of reccurence within a family. It is thought that FHS may be
- a new dominant mutation. A mutation is an unusual change in genetic material
- that has occurred for no apparent reason. The alteration changes the
- original expression of the gene. When a mutation occurs it can be
- transmitted to future generations.
-
- Affected Population
-
- Floating-Harbor Syndrome is a very rare disorder that affects males and
- females in equal numbers. There have been approximately twenty cases of this
- disorder reported in the medical literature. It is thought that the
- incidence of this disorder may actually be higher because many cases go
- unrecognized.
-
- Related Disorders
-
- Symptoms of the following disorders can be similar to those of Floating-
- Harbor Syndrome. Comparisons may be useful for a differential diagnosis:
-
- Dubowitz Syndrome is a rare disorder thought to be inherited as an
- autosomal recessive genetic trait. Symptoms of this disorder are apparent at
- birth. Short stature, dental abnormalities, low birth weight, and/or unusual
- facial features are characteristic of Dubowitz Syndrome. (For more
- information on this disorder, choose "Dubowitz Syndrome" as your search term
- in the Rare Disease Database).
-
- Russell-Silver Syndrome is a rare disorder commonly thought of as a type
- of dwarfism. People with this disorder are short with a small triangular-
- shaped face, and light brown spots on the skin. Developmental abnormalities,
- as well as abnormal curvature of the fifth finger, may also be present. The
- exact cause of Russell-Silver Syndrome is not known although some medical
- researchers believe it may be inherited as either an X-linked or dominant
- genetic trait with incomplete penetrance. (For more information on this
- disorder, choose "Russell-Silver Syndrome" as your search term in the Rare
- Disease Database).
-
- Three M Syndrome is a rare disorder characterized by low birth weight,
- short stature, narrow face, abnormal bending of the fingers (clinodactyly),
- and thin-slender long bones. The head appears to be large and the face has a
- triangular shape. A prominent mouth as well as a short neck are also
- features of this disorder. Three M Syndrome is inherited as an autosomal
- recessive genetic trait.
-
- Therapies: Standard
-
- Patients with Floating-Harbor Syndrome will benefit from an educational
- environment that provides appropriate programs to assist their needs. Speech
- therapy as well as teachers trained to work with learning disabilities will
- be of benefit.
-
- Genetic counseling may be of benefit for patients and their families.
- Other treatment is symptomatic and supportive.
-
- Therapies: Investigational
-
- Research on birth defects and their causes is ongoing. The National
- Institutes of Health (NIH) is sponsoring the Human Genome Project which is
- aimed at mapping every gene in the human body and learning why they sometimes
- malfunction. It is hoped that this new knowledge will lead to prevention and
- treatment of genetic disorders in the future.
-
- This disease entry is based upon medical information available through
- January 1993. 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.
-
- Resources
-
- For more information on Floating Harbor Syndrome, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- Floating-Harbor Syndrome Support Group
- 27 Hatfield Road
- Dagenham
- Essex, RM9 6JR
-
- The National Arthritis and Musculoskeletal and Skin Diseases Information
- Clearinghouse
- Box AMS
- Bethesda, MD 20892
- (301) 495-4484
-
- Human Growth Foundation (HGF)
- 7777 Leesburg Pike
- P.O. Box 3090
- Falls Church, VA 22043
- (703) 883-1773
-
- Short Stature Foundation
- 17200 Jamboree Rd., Suite J
- Irvine, CA 92714-5828
- (714) 474-4554
- (800) 24-DWARF
-
- Association for Research into Restricted Growth
- 2 Mount Court
- 81 Central Hill
- London SE 19 1BS
- England
-
- For Genetic Information and Genetic Counseling Referrals:
-
- March of Dimes Birth Defects Foundation
- 1275 Mamaroneck Avenue
- White Plains, NY 10605
- (914) 428-7100
-
- Alliance of Genetic Support Groups
- 35 Wisconsin Circle, Suite 440
- Chevy Chase, MD 20815
- (800) 336-GENE
- (301) 652-5553
-
- References
-
- MENDELIAN INHERITANCE IN MAN, 10th Ed.: Victor A. McKusick, Editor: Johns
- Hopkins University Press, 1990. Pp. 398.
-
- FLOATING-HARBOR SYNDROME: M.A. Patton, et al.; J Med Genet (1991, issue
- 28). Pp. 201-204.
-
- FLOATING-HARBOR SYNDROME AND CELIAC DISEASE: A.E. Chudley, et al.; Am J
- Med Genet (March 15, 1991, issue 38(4)). Pp. 562-4.
-
-