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- $Unique_ID{BRK03406}
- $Pretitle{}
- $Title{Aase Syndrome}
- $Subject{Aase Syndrome Anemia-Congenital Triphalangeal Thumb Syndrome
- Triphalangeal Thumb Syndrome}
- $Volume{}
- $Log{}
-
- Copyright (C) 1986, 1990 National Organization for Rare Disorders, Inc.
-
- 106:
- Aase Syndrome
-
- ** IMPORTANT **
- It is possible that the main title of the article (Aase Syndrome) is not
- the name you expected. Please check the SYNONYM listing to find the
- alternate names and disorder subdivisions covered by this article.
-
- Synonyms
-
- Anemia-Congenital Triphalangeal Thumb Syndrome
- Triphalangeal Thumb 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.
-
-
- Aase syndrome is characterized by congenital anemia, three, rather than
- the normal two, bones in the thumb (i.e., triphalangeal thumb), and various
- other anatomic anomalies. Only boys are affected, and the disorder is
- thought to be hereditary. The anemia often diminishes as the boy grows
- older.
-
- Symptoms
-
- Features of Aase syndrome are present from birth. The child is pale, with a
- mild growth deficiency. Laboratory studies reveal a deficiency of red and,
- to varying degrees, white blood cells, due to underdevelopment of the bone
- marrow. The liver and spleen may be enlarged.
-
- The thumbs have three bones and therefore two joints, rather than the
- normal two bones and single joint. The bones of the skull fuse later than in
- normal children. Shoulders tend to be narrow.
-
- There may be cardiac defects, especially an incomplete septum between the
- right and left ventricles of the heart.
-
- Causes
-
- The causes of Aase syndrome are not known. It may be an X-linked recessive
- disorder. (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.)
-
- Therapies: Standard
-
- Treatment for Aase Syndrome is supportive. The hypoplastic anemia in people
- suffering from Aase Syndrome is usually treated by bone marrow
- transplantation from HLA compatible siblings. In some cases, symptomatic
- therapy with corticosteroids and blood transfusions is indicated.
-
- 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 Aase Syndrome, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- NIH/National Heart, Lung and Blood Institute (NHLBI)
- 9000 Rockville Pike
- Bethesda, MD 20892
- (301) 496-4236
-
- Human Growth Foundation (HGF)
- 7777 Leesburg Pike
- P.O. Box 3090
- Falls Church, VA 22043
- (703) 883-1773
- (800) 451-6434
-
- NIH/National Institute of Child Health and Human Development
- 9000 Rockville Pike
- Bethesda, MD 20892
- (301) 496-5133
-
- For information on genetics and genetic counseling referrals, please
- contact:
-
- March of Dimes Birth Defects Foundation
- P.O. Box 2000
- 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
-
- SMITH'S RECOGNIZABLE PATTERNS OF HUMAN MALFORMATION, 4th ed., Kenneth L.
- Jones, M.D., W.B. Saunders, Co. 1988. Pp. 276-77.
-
- MENDELIAN INHERITANCE IN MAN, 8th ed.: Victor A. McKusick; Johns Hopkins
- University Press, 1986. P. 439.
-
-