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- $Unique_ID{BRK04231}
- $Pretitle{}
- $Title{Spondyloepiphyseal Dysplasia Tarda}
- $Subject{Spondyloepiphyseal Dysplasia Tarda X-linked Spondyloepiphyseal
- Dysplasia SED Tarda }
- $Volume{}
- $Log{}
-
- Copyright (C) 1986, 1987, 1990 National Organization for Rare Disorders, Inc.
-
- 294:
- Spondyloepiphyseal Dysplasia Tarda
-
- ** IMPORTANT **
- It is possible the main title of this article (Spondyloepiphyseal
- Dysplasia Tarda) is not the name you expected. Please check the SYNONYMS
- listing to find the alternate names and disorder subdivisions covered by this
- article.
-
- Synonyms
-
- X-linked Spondyloepiphyseal Dysplasia
- SED Tarda
-
- 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.
-
-
- Spondyloepiphyseal Dysplasia Tarda is a hereditary disorder which most
- often affects males. It is characterized by dwarfism and skeletal
- abnormalities.
-
- Symptoms
-
- Symptoms of SED Tarda are usually not apparent until 5 to 10 years of age, at
- which point spinal growth appears to stop. The shoulders assume a hunched
- appearance, the neck appears to become shorter and the chest broadens.
- During adolescence, the skeletal abnormalities may cause pain in the back,
- hips, shoulders, knees and ankles. As adults, patients with the disorder
- have a mild case of dwarfism, with a short trunk, large chest cage and
- relatively normal limb length. Hands, head and feet appear to be normal
- size, but height usually ranges from 4'4" to 5'2".
-
- Causes
-
- SED Tarda is believed to be caused by an X-linked recessive inheritance.
-
- (Human traits including the classic genetic diseases, are the product of the
- interaction of two genes for that condition, one received from the father and
- one from the mother. X-linked recessive disorders are conditions which are
- coded on the X chromosome. Females have two X chromosomes, but males have
- one X chromosome and one Y chromosome. Therefore in females, disease traits
- on the X chromosome can be masked by the normal gene on the other X
- chromosome. Since males have only one X chromosome, if they inherit a gene
- for a disease present on the X, it will be expressed. Men with X-linked
- disorders transmit the gene to all their daughters, who are carriers, but
- never to their sons. Women who are carriers of an X-linked disorder have a
- fifty percent risk of transmitting the carrier condition to their daughters,
- and a fifty percent risk of transmitting the disease to their sons.)
-
- Related Disorders
-
- Morquio Disease, or Mucopolysaccharidosis IV is an autosomal recessive
- inherited disorder detectable usually at 18 months of age. Its features
- include retarded growth, clouding of the cornea, hearing loss, and flow of
- blood back from the aorta into the left ventricle of the heart (aortic
- regurgitation). This disorder affects males and females equally. (For more
- information, choose "Morquio" as your search term in the Rare Disease
- Database.)
-
- Spondyloepiphyseal Dysplasia Congenita is a disorder with autosomal
- dominant inheritance which can have considerable variability in the severity
- of symptoms. It is characterized by flat facial features, myopia, retinal
- detachment, cleft palate, clubfoot, short-trunk dwarfism, a waddling gait and
- normally sized hands and feet. This disorder, which is often detectable at
- birth, affects males and females equally. (For more information, choose
- "SED" as your search term in the Rare Disease Database.)
-
- Multiple Epiphyseal Dysplasia, like SED Congenita, is caused by an
- autosomal dominant gene affecting males and females equally. The disorder is
- detectable between two and five years of age with the appearance of a
- waddling gait. Patients may experience pain as a result of osteoarthritic
- changes in the joints. Body size tends to be almost normal, with the
- exception of the hands and feet which are disproportionately small.
-
- Therapies: Standard
-
- Prevention of SED Tarda can be achieved through genetic counseling.
- Treatment of the disorder is supportive and symptomatic. Physical therapy is
- used to relieve joint stiffness and pain. Total hip replacement may
- eventually be the treatment of choice for severely debilitating
- osteoarthritis of the hips.
-
- Therapies: Investigational
-
- This disease entry is based upon medical information available through
- January 1990. 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 Spondyloepiphyseal Dysplasia Tarda, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- NIH/National Institute of Child Health and Human Development
- 9000 Rockville Pike
- Bethesda, MD 20892
- (301) 496-5133
-
- The Magic Foundation
- 1327 N. Harlem Ave.
- Oak Park, IL 60302
- (708) 383-0808
-
- Human Growth Foundation (HGF)
- 7777 Leesburg Pike
- P.O. Box 3090
- Falls Church, VA 22043
- (703) 883-1773
- (800) 451-6434
-
- Little People of America
- P.O. Box 633
- San Bruno, CA 94066
- (415) 589-0695
-
- Short Stature Foundation
- 17200 Jamboree Rd., Suite J
- Irvine, CA 92714-5828
- (714) 474-4554
- 800-24 DWARF
-
- National Cleft Palate Association
- 1218 Grandview Ave.
- Pittsburgh, PA 15211
- 1-800-24CLEFT
- 1-800-23CLEFT
-
- For information on genetics and genetic counseling referrals, please
- contact:
-
- 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
-
- BIRTH DEFECTS COMPENDIUM, 2nd ed: Daniel Bergsma, ed; March of Dimes, 1979.
- Pp. 970-1.
-
-