MEHMO syndrome

What is MEHMO syndrome?

MEHMO syndrome is characterised by severe intellectual deficit, epilepsy, microcephaly, hypogenitalism, and obesity. Growth delay and diabetes are also present. To date, it has been described in seven boys, all of whom died within the first two years of life. The causative gene has been localised to the 21.1-22.13p region of the X chromosome and the syndrome appears to result from mitochondrial dysfunction.

Other condition names

  • X-linked intellectual disability-epileptic seizures-hypogenitalism-microcephaly-obesity syndrome

Inheritance type

X-linked recessive


  • Worldwide: <1 in 1,000 000

Age of Onset

  • Antenatal
  • Infancy
  • Neonatal
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