Short answer · Medically reviewed summary · Last updated: 2026-05-08
Trimethylaminuria is a rare metabolic disorder primarily known by its scientific name and the descriptive term "fish odor syndrome." While it is officially classified as trimethylaminuria (TMAU) in medical literature, patients may encounter various historical or descriptive synonyms that reflect its clinical presentation of body odor. What are the common synonyms for Trimethylaminuria? In medical contexts, trimethylaminuria is the standardized term used to describe the body's inability to break down the compound trimethylamine. Historically, and in non-medical literature, it has been referred to as "fish odor syndrome" due to the characteristic scent produced by the excess excretion of trimethylamine in sweat, urine, and breath.
Trimethylaminuria synonyms
Other names for Trimethylaminuria: synonyms, acronyms and related terms used by doctors and patients.
Trimethylaminuria is a rare metabolic disorder primarily known by its scientific name and the descriptive term "fish odor syndrome." While it is officially classified as trimethylaminuria (TMAU) in medical literature, patients may encounter various historical or descriptive synonyms that reflect its clinical presentation of body odor.
What are the common synonyms for Trimethylaminuria?
In medical contexts, trimethylaminuria is the standardized term used to describe the body's inability to break down the compound trimethylamine. Historically, and in non-medical literature, it has been referred to as "fish odor syndrome" due to the characteristic scent produced by the excess excretion of trimethylamine in sweat, urine, and breath. Other, less common terms include "fish malodor syndrome" or "trimethylamine oxidase deficiency," which reflects the enzymatic root of the condition.
Why does Trimethylaminuria have multiple names?
The existence of multiple names for trimethylaminuria stems from its historical description based on symptoms rather than genetic pathology. Early clinical reports focused on the socially distressing odor, leading to the colloquial "fish odor syndrome." As our understanding of genetics and metabolic pathways improved, the medical community shifted to the more precise, biochemical term trimethylaminuria to reflect the underlying FMO3 gene mutation or secondary metabolic dysfunction.
How is the condition classified in medical systems?
For clinical documentation and research purposes, the following identifiers are used to standardize trimethylaminuria across global health systems:
- Orphanet: ORPHA886
- OMIM (Online Mendelian Inheritance in Man): #602079
- ICD-10: E88.8 (Other specified metabolic disorders)
- GARD (NIH): 7847
Which name is preferred by medical professionals?
Medical professionals and researchers currently prefer the term trimethylaminuria (TMAU). Using this specific terminology ensures accurate communication between specialists, such as metabolic geneticists and endocrinologists, and helps patients receive the correct diagnostic coding in their medical records. At DiseaseMaps.org, our community of 34 members living with trimethylaminuria uses this term to foster clear communication and shared experiences.
Next steps
- Consult with a metabolic geneticist or an endocrinologist for specialized testing.
- Maintain a detailed dietary log to track triggers that may worsen trimethylaminuria symptoms.
- Join the DiseaseMaps community to connect with others who understand the day-to-day challenges of this condition.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
