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Research paper

International League Against Epilepsy classification and definition of epilepsy syndromes with onset in childhood: Position paper by the ILAE Task Force on Nosology and Definitions

Canonical ILAE 2022 position paper formally introducing the DEE-SWAS / EE-SWAS nomenclature and replacing older ESES/CSWS terms. Establishes SWI threshold framing, etiology stratification, and the developmental-vs-non-developmental axis now used across the field.

Indexed context

Specchio N, Wirrell EC, Scheffer IE, et al.

ilaedee-swasnosologyclassificationposition-paper

Markdown path

content/research/papers/2022-specchio-ilae-2022-childhood-syndromes.md

Findings

Canonical ILAE 2022 position paper formally introducing the DEE-SWAS / EE-SWAS nomenclature and replacing older ESES/CSWS terms. Establishes SWI threshold framing, etiology stratification, and the developmental-vs-non-developmental axis now used across the field.

Why it may matter for Levi

The reference document for why Levi is classified as DEE-SWAS rather than EE-SWAS (pre-existing global delay before SWAS onset) and for the language Stanford/UCSF use in clinic notes. Foundational for every downstream 2022+ DEE-SWAS paper in the corpus.

Paper text

Specchio et al. (2022) — ILAE childhood epilepsy syndrome classification

Source

  • Epilepsia 63(6):1398–1442. DOI 10.1111/epi.17241.

Why in corpus

This is the canonical ILAE 2022 classification paper that introduced the DEE-SWAS / EE-SWAS terminology replacing the older ESES / CSWS terms. It is the definitional reference underlying Levi's specific diagnosis.

Key findings

  • Unified term DEE-SWAS (and the developmental-only subtype EE-SWAS) adopted as the ILAE standard.
  • Preserves Landau-Kleffner syndrome as a clinically distinct subtype within the spectrum.
  • Emphasizes spike-wave activation in sleep as the defining electrographic feature driving the encephalopathic process.
  • Retains SWI thresholds but allows diagnostic flexibility; recognizes cognitive impact at SWI below the historical 85% threshold.

Levi-relevant takeaways

  • Definitional anchor for Levi's diagnosis. Useful in provider communication and documentation.
  • The DEE-SWAS vs. EE-SWAS distinction matters for Levi — his 2023–2024 developmental trajectory (initial language delay + ASD features) predates the DEE-SWAS crystallization, which would classify him as DEE-SWAS rather than EE-SWAS. DEE-SWAS carries worse long-term cognitive outcomes per the Lapid & Varughese 2026 review and Caraballo 2013 data.
  • No treatment implications of its own; frames every other DEE-SWAS paper in the corpus.