" /> Trimethylaminuria - CISMeF





Preferred Label : Trimethylaminuria;

Symbol : TMAU;

CISMeF acronym : TMAU;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Fish-odor syndrome;

Description : Trimethylaminuria results from the abnormal presence of large amounts of volatile and malodorous trimethylamine within the body. This chemical, a tertiary aliphatic amine, is excreted in the urine, sweat (ichthyohidrosis), and breath, which take on the offensive odor of decaying fish (Mitchell, 1996).;

Inheritance : Autosomal recessive;

Molecular basis : Caused by mutation in the flavin-containing monooxygenase 3 gene (FMO3, 136132.0001);

Laboratory abnormalities : Large amounts of TMA in urine, sweat, and breath; Trimethylaminuria; Deficiency of FMO-mediated N-oxidation of amino-trimethylamine (TMA) derived from foodstuffs;

Prefixed ID : #602079;

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06/05/2025


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