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Well over 100 inborn errors of metabolism can now be detected by newborn screening, with more certainty. Concomitantly with the onset of the symptoms, the patient affected with MSUD emits an intense (sweet, malty, caramel-like) maple-syrup-like odor. In general, neonatal (classic) MSUD does not display pronounced abnormalities on routine laboratory tests.
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Maple syrup urine disease (MSUD) is ametabolismdisorder passed down through families in which the body cannot break down certain parts of proteins. Urine in persons with this condition can smell like maple syrup.
Maple syrup urine disease (MSUD) is caused by a gene defect. Persons with this condition cannot break down theamino acidsleucine, isoleucine, and valine. This leads to a buildup of these chemicals in the blood.
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Treatment involved dietary restriction of the amino acids leucine, isoleucine, and valine. This treatment must begin very early to prevent brain damage. So, yes.
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Maple Syrup Urine Disease (MSUD) was discovered by John Menkes in 1954. This is a disorder whereby there is a disruption in the metabolism of branched-chained amino acids.
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Maple syrup urine disease (MSUD) is inherited through specific genetic mutations that impact the body's ability to break down certain amino acids. It is passed down in an autosomal recessive pattern, meaning both parents must be carriers of the gene mutation for a child to inherit the disease. Early detection through newborn screening and dietary management are crucial for individuals with MSUD.
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Yes, maple syrup urine disease (MSUD) is an autosomal recessive genetic disorder, not a sex-linked disorder. It is caused by mutations in genes on autosomal chromosomes, which both males and females can inherit equally.
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It is an autosomal recessive condition.
MSUD is an autosomal-recessive disorder, with an incidence of 1 in 120 000 to 1 in 500 000. It is highly prevalent in the inbred Mennonite population in Pennsylvania, occurring in approximately 1 in 176 newborns. In countries where consanguineous marriages are common the frequency is also higher (about 1 in 50 000 in Turkey). About 75% of those affected suffer from the severe classic form, and the remainder suffer from the milder intermediate or intermittent variants. Over 150 different causal mutations scattered among the three E1α, E1β, and E2 genes give rise to either classic or intermediate clinical phenotypes.
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Yes, but the question is should they. MSUD is a recessive genetic condition and a child must inherit two copies of the nonworking gene, one from each parent. The parents often do not show signs and symptoms. The genes that are non-working cannot break down some amino acids and produce maple syrup urine disease. These are often called the branched chain amino acids. High levels of these unbroken amino acids are toxic. And these children must receive treatment as they are at risk for brain damage or death. About one out of every 380 babies from the Old Order Mennonite population is affected. So it is found in populations that are small, carry the recessive gene and intermarry.
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Maple syrup urine disease (MSUD) is a metabolism disorder passed down through families in which the body cannot break down certain parts of proteins. Urine in persons with this condition can smell like maple syrup.
Alternative NamesMSUD
Causes, incidence, and risk factorsMaple syrup urine disease (MSUD) is caused by a gene defect. Persons with this condition cannot break down the branched-chain amino acidsleucine, isoleucine, and valine. This leads to a buildup of these chemicals in the blood.
In the most severe form, MSUD can damage the brain during times of physical stress (such as infection, fever, or not eating for a long time).
MSUD also occurs in an intermittent form and a mild form. Even in the mildest form, repeated periods of physical stress can cause mental retardationand high levels of leucine.
SymptomsSigns and testsThere will be signs of ketosis and excess acid in blood (acidosis).
TreatmentWhen the condition is diagnosed, and during episodes, treatment involves eating a protein-free diet. Fluids, sugars, and possibly fats are given through a vein (IV). Peritoneal dialysis or hemodialysis can be used to reduce the level of amino acids.
A special diet free of branched-chain amino acids is started when amino acid levels are normal. The health care provider will follow these levels closely, and will adjust the diet based on amino acid levels.
Long term treatment requires a special diet. The diet includes a man-made infant formula with low levels of the amino acids leucine, isoleucine, and valine. Persons with this condition must remain on this diet permanently.
It is very important to always follow this diet to prevent nervous system (neurological) damage. This requires frequent blood tests and close supervision by a registered dietitian and physician, as well as cooperation by the parents.
Expectations (prognosis)This disease can be life threatening if untreated.
Even with dietary treatment, stressful situations and illness can still cause high levels of certain amino acids. Death may occur during these episodes. With strict dietary treatment, children have grown into healthy adulthood.
ComplicationsCall your health care provider if you have a family history of MSUD and are planning to start a family. Also call immediately if you have a newborn who has symptoms of maple syrup urine disease.
PreventionGenetic counseling is suggested for people who want to have children and who have a family history of maple syrup urine disease. Many states now screen all newborns with blood tests for MSUD.
If a screening test shows that your baby may have MSUD, a follow-up blood test for amino acid levels should be done right away to confirm the disease.
ReferencesWendel U, Ogier de Baulny H. Branched-chain organic acidurias/acidemias. In: Fernandes J, Saudubray J-m, van den Berghe G, Walter JH, eds. Inborn Metabolic Diseases: Diagnosis and Treatment. 4th ed. New York, NY: Springer; 2006:chap 19.
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Urine smelling like pickles could be due to a condition called Maple Syrup Urine Disease (MSUD), which is a rare genetic disorder that affects the way the body metabolizes certain amino acids. This can lead to a distinctive odor resembling maple syrup or, in some cases, pickles. It is important to consult a healthcare professional for proper diagnosis and treatment if you notice unusual odors in your urine.
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There are various causes of sweet smell in the urine. Most are transient and due to metabolizing various foods. Sometimes strong odor is due to highly concentrated urine when one hasn't consumed enough water, easily fixed. Another cause is sweet smell due to uncontrolled diabetes melitus, which can be determined through urinalysis evaluated by a physician.
There is a rare metabolic disease called Mapple Syrup Urine Disease , as the smell is like slightly burnt sugar - or for people who have actually smelt mapple syrup, that is apparently what the urine smell is similar to. The incidence of this illness is around one in 200.000 births, with the exception of a small intermarrying community of Northern European descent in the USA where the incidence is much higher. This neurological condition effects infants and children and would not present in adults.
MSUD, as it is known, is a condition where the body can't deal with substances called branched aminoacids. One of these, called leucine is toxic, in particular to the brain. There are various types of the disease, symptoms range from brain disfunction and death in the newborn period to very mild indeed. Many children will have mental retardation, even if their MSUD is discovered early and the metabolic doctors that care for them put them on the special protective diet at a very young age.
Some very fortunate children are known to have normal intelligence, this requires very good metabolic control throughout their lifetime.
Other causes of sweet smell in the urine are very rare indeed. One should have a talk with a doctor who specialises in metabolic medicine if one is concerned that urine smells very different to the usual. The tests to find out what is wrong and the methods to fix the problem are very complex.
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Inborn errors of metabolism are rare genetic disorders in which the body cannot properly turn food into energy. The disorders are usually caused by defects in specific proteins (enzymes) that help break down (metabolize) parts of food.
Alternative NamesMetabolism - inborn errors of
Side EffectsA food product that is not metabolized (broken down into energy) can build up in the body and cause a wide array of symptoms. Several inborn errors of metabolism cause developmental delay if not controlled. There are wide number of inborn errors of metabolism. This article offers a general overview.
Specific information is available on the following forms of inborn errors of metabolism:
RecommendationsDiet changes may control the disorder. The type and extent of the changes depends on the specific metabolic error. For example, persons with galactosemia should avoid milk and milk products, including yogurt, cheese, and ice cream. Galactose and lactose-free milk substitutes and foods should be used.
Health care providers and registered dietitians can help create a diet appropriate for the specific disease.
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