occipital horn syndrome
MONDO:0010572
Occipital horn syndrome (OHS) is a mild form of Menkes disease (MD), a syndrome characterized by progressive neurodegeneration and connective tissue disorders due to a copper transport defect.
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Occipital horn syndrome
Occipital horn syndrome (OHS), formerly considered a variant of Ehlers–Danlos syndrome, is an X-linked recessive mitochondrial and connective tissue disorder. It is caused by a deficiency in the transport of the essential mineral copper, associated with mutations in the ATP7A gene. Only about 2/3 of children with OHS are thought to have genetically inherited the disorder; the other 1/3 do not have the disease in their family history. Since the disorder is X-linked recessive the disease affects more males. This is because they do not have a second X chromosome, unlike females, so essentially are lacking the 'backup' copy with proper function. Females are much more likely to be carriers only. For a female to be affected they must carry two defective X chromosomes, not just one. The disorder is considered a milder variant of Menkes disease.
Background only. Canonical identity remains MONDO; clinical-trial relationships come from ClinicalTrials.gov.Drugs being studied
Disease identity and terminology: MONDO. Trial relationships: ClinicalTrials.gov.