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Start free with EleplanAutosomal recessive extra-oral halitosis
ORPHA:562538Disease
Also called MTO-deficiency · Methanethiol oxidase deficiency
What it is
A rare inborn error of metabolism characterized by cabbage-like breath odor with high levels of methanethiol and dimethylsulfide in oral and nasal breath, due to methanethiol oxidase deficiency. Laboratory examination shows elevated levels of dimethylsulfide, dimethylsulfoxide, and dimethylsulfone in blood, cerebrospinal fluid (CSF), and urine.
Key facts
- Inheritance
- Autosomal recessive
- Classified as
- Disease
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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