The idiopathic generalized epilepsies (IGEs) have historically included the syndromes childhood absence epilepsy (CAE), juvenile absence epilepsy (JAE), juvenile myoclonic epilepsy (JME), and epilepsy with generalized tonic-clonic seizures alone (GTCA). Recognition of the IGEs is important for clinical care, as it informs diagnosis, prevents unnecessary investigation, allows optimal selection of anti-seizure medications (ASMs), and provides prognostic guidance.

According to the new ILAE definition in 2022, the study aims to describe the clinical features, electroencephalographic, imaging findings and long-term prognosis.

the Long-term prognosis include the rate of drug-resistent epilepsy, relapse after drug withdrawn, common comorbidities such as mood disorders, attention deficit hyperactivity disorder (ADHD) and learning disabilities.

Inclusion Criteria:

• Patients are consecutively and prospectively enrolled from epilepsy center, with newly diagnosed epilepsy or established epilepsy.
• Patients have a diagnosis of idiopathic generalized epilepsy (IGE), according to the 2022 diagnostic criteria.
• Comprehensive clinical information is collected, and 24 hour video-electroencephalography is performed.
• Sign the informed consent forms.

Exclusion Criteria:

• Other epilepsy syndromes are considered during follow-up, such as genetic generalized epilepsy.
• Lost to follow-up

Patients are consecutively and prospectively recruited from epilepsy center and clinics