Hemimegalencephaly
MONDO:0020492Hemimegalencephaly is a rare cerebral malformation characterized by overgrowth of all or part of a cerebral hemisphere, often with ipsilateral severe cortical dysplasia or dysgenesis, white matter hypertrophy and dilated lateral ventricle, presenting in early infancy with progressive hemiparesis, severe psychomotor retardation and intractable seizures. Hemimegalencephaly may be an isolated finding or associated with other syndromes such as angioosteohypertrophic syndrome, epidermal nevus syndrome and Ito hypomelanosis. Management includes seizure control by antiepileptic medications and early hemispherectomy.
Also known as: unilateral megalencephaly, macrencephaly
7 clinical trials for this condition and its sub-types.
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Massive data collection launched for brain surgery patients
Knowledge-focused Recruiting nowThis study is gathering medical information and samples from up to 5,000 people with neurosurgical conditions like brain tumors, epilepsy, and Parkinson's disease. Participants receive standard care while their data is collected for future research. No new treatments are being te…
Sponsor: National Institute of Neurological Disorders and Stroke (NINDS) • Aim: Knowledge-focused
Last updated Jun 27, 2026 14:00 UTC
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Hunting for hidden genetic triggers of severe childhood epilepsy
Knowledge-focused Recruiting nowThis study aims to find genetic mutations in the brain that cause drug-resistant epilepsy in children. Researchers will compare DNA from blood and brain tissue, including samples from special electrodes placed in the brain. The goal is to better understand the root causes of thes…
Sponsor: Fondation Ophtalmologique Adolphe de Rothschild • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:09 UTC
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Scientists map DNA 'Signatures' in rare fetal diseases
Knowledge-focused Recruiting nowThis study looks at DNA methylation patterns (chemical tags on DNA) in fetuses with rare genetic diseases. Researchers will analyze DNA from amniotic fluid and tissue samples to create reference signatures. The goal is to improve diagnosis of these conditions before birth. The st…
Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:01 UTC
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Gene tests for sick newborns: a lifesaver in the NICU?
Knowledge-focused Recruiting nowThis study is testing whether using rapid genetic sequencing can help doctors diagnose and treat birth defects in newborns in intensive care. Researchers will enroll 2,000 babies and compare death rates, disability rates, and genetic findings. The goal is to see if personalized t…
Sponsor: Children's Hospital of Fudan University • Aim: Knowledge-focused
Last updated Jun 26, 2026 13:36 UTC