Jeavons syndrome in China

Area of Science:

• Neurology
• Epileptology
• Clinical Neuroscience

Background:

• Jeavons syndrome (JS) is an underreported epileptic syndrome characterized by eyelid myoclonia (EM), eye closure-induced seizures, and photosensitivity.
• Western studies report focal posterior or frontal predominant epileptiform discharges (OPEDs/FPEDs) in JS, but clinical differences and Chinese population data are lacking.

Purpose of the Study:

• To report the clinical and electroencephalographic features of 50 Chinese patients with Jeavons syndrome.
• To evaluate for distinct clinical features between patients with OPEDs and FPEDs.

Main Methods:

• Retrospective analysis of 50 Chinese patients diagnosed with Jeavons syndrome (2010-2011).
• Long-term 24-hour video-EEG recording, brain imaging (MRI/CT), and intellectual assessment (Webster IQ).
• Patients were divided into FPEDs and OPEDs groups for comparative analysis of clinical and electrographic findings.

Main Results:

• Eyelid myoclonia was present in all 50 patients.
• The FPEDs group (32 patients) showed a male predominance (22/32) and earlier onset (median 8 years) with more frequent EM with absences (21/32) and eyeball rolling up (14/32).
• The OPEDs group (18 patients) had a female predominance (15/18) and later onset (median 5.8 years) with less frequent EM with absences (2/18) and eyeball rolling up (1/18).

Conclusions:

• Jeavons syndrome is underdiagnosed in China.
• Two potential JS subtypes exist: a male-predominant FPEDs group and a female-predominant OPEDs group.
• Either frontal or occipital lobes may initiate generalized spike-and-wave discharges and seizures in this idiopathic generalized epilepsy.