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- $Unique_ID{BRK03759}
- $Pretitle{}
- $Title{Fructosuria}
- $Subject{Fructosuria Levulosuria Hepatic Fructokinase Deficiency Essential
- Fructosuria Diabetes, Insulin-Dependent}
- $Volume{}
- $Log{}
-
- Copyright (C) 1988, 1989 National Organization for Rare Disorders, Inc.
-
- 573:
- Fructosuria
-
- ** IMPORTANT **
- It is possible that the main title of this article (Fructosuria) is not
- the name you expected. Please check the SYNONYMS listing to find the
- alternate names and disorder subdivisions covered by this article.
-
- Synonyms
-
- Levulosuria
- Hepatic Fructokinase Deficiency
- Essential Fructosuria
-
- Information on the following disorder can be found in the Related
- Disorders section of this report:
-
- Diabetes, Insulin-Dependent
-
- 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 physician and/or the agencies listed in the "Resources" section
- of this report.
-
- Fructosuria is a very rare inherited metabolic disorder. It is
- characterized by the excretion of fruit sugar (fructose) in the urine.
- Normally, no fructose is excreted in the urine. This condition is caused by
- a deficiency of the enzyme fructokinase in the liver. This enzyme is needed
- for the synthesis of glycogen (the body's form of stored energy) from
- fructose. The presence of fructose in the blood and urine may lead to an
- incorrect diagnosis of Diabetes Mellitus.
-
- Symptoms
-
- Fructosuria is characterized by the presence of fructose in the urine. There
- are no other symptoms. However, the fructose may be mistaken for glucose
- (blood sugar) leading to an incorrect diagnosis of Diabetes Mellitus.
-
- Causes
-
- Fructosuria is a rare hereditary disorder transmitted by autosomal recessive
- genes. (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. In recessive disorders, the condition
- does not appear unless a person inherits the same defective gene for the same
- trait from each parent. If one receives one normal gene and one gene for the
- disease, the person will be a carrier for the disease, but usually will show
- no symptoms. The risk of transmitting the disease to the children of a
- couple, both of whom are carriers for a recessive disorder, is 25 percent.
- Fifty percent of their children will be carriers, but healthy as described
- above. Twenty-five percent of their children will receive both normal genes,
- one from each parent, and will be genetically normal.)
-
- Affected Population
-
- Fructosuria affects about 1 out of every 130,000 persons in the United
- States. It affects males and females in equal numbers.
-
- Related Disorders
-
- Comparison of the following disorder with Fructosuria may be useful for a
- differential diagnosis:
-
- Diabetes Mellitus is a common disorder in which the body does not produce
- enough insulin and is, therefore, unable to convert nutrients into the energy
- necessary for daily activity. The disorder affects females and males
- approximately equally. Although the causes of Insulin-Dependent Diabetes are
- not known, genetic factors seem to play a role. Symptoms of Diabetes
- Mellitus can be very debilitating if left untreated, whereas Fructosuria does
- not cause excessive thirst, weight loss or fatigue. (For more information,
- choose "Diabetes" as your search term in the Rare Disease Database.)
-
- Therapies: Standard
-
- Diagnosis of Fructosuria is made by testing the urine for the presence of
- fructose. Fructosuria does not require treatment as the symptoms are
- harmless.
-
- Therapies: Investigational
-
- This disease entry is based upon medical information available through
- December 1988. 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 Fructosuria, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- National Digestive Diseases Information Clearinghouse
- Box NDDIC
- Bethesda, MD 20892
- (301) 468-6344
-
- Research Trust for Metabolic Diseases in Children
- Golden Gates Lodge, Weston Rd.
- Crewe CW1 1XN, England
- Telephone: (0270) 250244
-
- For information on genetics and genetic counseling referrals, 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
-
- MENDELIAN INHERITANCE IN MAN, 7th ed.: Victor A. McKusick; Johns Hopkins
- University Press, 1986. P. 978.
-
- ESSENTIAL FRUCTOSURIA, HEREDITARY FRUCTOSE INTOLERANCE, AND FRUCTOSE-1,6-
- DIPHOSPHATASE DEFICIENCY: R. Gitzelmann, et al.; In: THE METABOLIC BASIS OF
- INHERITED DISEASE, 5th ed.: John B. Stanbury, et al.; McGraw Hill, 1983.
- Pp. 118-140.
-
-