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Syndrome reference sheet
Generated 13 Oct 2026
Endocrinology · Endocrinology / Metabolic disorders Triple H syndrome
Also known as: Hyperornithinemia–hyperammonemia–homocitrullinuria syndrome
Urea cycle disorder from mitochondrial ornithine transporter deficiency.
- Medical specialty
- Endocrinology
- Subspecialty
- Endocrinology / Metabolic disorders
- Sex & age distribution
- Male: affected; Female: affected equally; Children: yes
- Gene(s) involved
- SLC25A15
Etiology & mechanism
SLC25A15 loss.
Gene(s) involved (1)
SLC25A15
Symptoms & signs (7)
ataxiadevelopmental delayhyperammonemialethargyprotein aversionspastic paraparesisvomiting