Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 01-Jul 2025. Module: SNOMED CT core
Descriptions:
| Id | Description | Lang | Type | Status | Case? | Module |
| 5386513017 | Epileptic encephalopathy with spike-and-wave activation in sleep | en | Synonym (core metadata concept) | Active | Entire term case insensitive (core metadata concept) | SNOMED CT core |
| 5386514011 | Epileptic encephalopathy with spike-and-wave activation in sleep (disorder) | en | Fully specified name | Active | Entire term case insensitive (core metadata concept) | SNOMED CT core |
| 5386515012 | EE-SWAS - epileptic encephalopathy with spike-and-wave activation in sleep | en | Synonym (core metadata concept) | Active | Entire term case sensitive (core metadata concept) | SNOMED CT core |
| 5464925015 | A type of epileptic encephalopathy that presents in individuals with normal development and cognition. It is characterized by plateauing or regression of various combinations of cognitive, language, behavioral, and motor functions that is concomitant with significant activation of spike-and-wave complexes during sleep. Onset of epileptic seizures is between 2 and 12 years of age (peak at 4 to 5 years). Epileptic seizures may or may not be clinically evident. There is no mandatory seizure type although focal seizures are common. Epileptic seizures typically worsen with the evolution of multiple seizure types including other focal seizure types, typical and atypical absence seizures, atonic seizures, and focal seizures with negative myoclonus. Neurological examination is normal. The EEG background during wakefulness may show focal or diffuse slowing and often contains focal or multifocal abnormalities but may be normal. Epileptiform abnormalities during wakefulness are not continuous. In drowsiness and sleep, there is marked activation of epileptiform activity, with slow (1.5 - 2Hz) spike-and-wave complexes in N-REM sleep. Spike-and-wave activation in sleep (SWAS) is usually diffuse but may occur more focally or multifocally. Normal sleep architecture is absent or difficult to distinguish. | en | Definition | Active | Entire term case sensitive (core metadata concept) | SNOMED CT core |
| 5464926019 | A type of epileptic encephalopathy that presents in individuals with normal development and cognition. It is characterised by plateauing or regression of various combinations of cognitive, language, behavioural, and motor functions that is concomitant with significant activation of spike-and-wave complexes during sleep. Onset of epileptic seizures is between 2 and 12 years of age (peak at 4 to 5 years). Epileptic seizures may or may not be clinically evident. There is no mandatory seizure type although focal seizures are common. Epileptic seizures typically worsen with the evolution of multiple seizure types including other focal seizure types, typical and atypical absence seizures, atonic seizures, and focal seizures with negative myoclonus. Neurological examination is normal. The EEG background during wakefulness may show focal or diffuse slowing and often contains focal or multifocal abnormalities but may be normal. Epileptiform abnormalities during wakefulness are not continuous. In drowsiness and sleep, there is marked activation of epileptiform activity, with slow (1.5 - 2Hz) spike-and-wave complexes in N-REM sleep. Spike-and-wave activation in sleep (SWAS) is usually diffuse but may occur more focally or multifocally. Normal sleep architecture is absent or difficult to distinguish. | en | Definition | Active | Entire term case sensitive (core metadata concept) | SNOMED CT core |
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values |
| Epileptic encephalopathy with spike-and-wave activation in sleep | Is a | Epileptic encephalopathy (disorder) | true | Inferred relationship | Some | ||
| Epileptic encephalopathy with spike-and-wave activation in sleep | Finding site | Brain structure | true | Inferred relationship | Some | 1 | |
| Epileptic encephalopathy with spike-and-wave activation in sleep | Pathological process (attribute) | Pathological developmental process | true | Inferred relationship | Some | 1 |
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| Landau-Kleffner syndrome | Is a | True | Epileptic encephalopathy with spike-and-wave activation in sleep | Inferred relationship | Some |
Reference Sets
Component annotation with string value reference set (foundation metadata concept)
FHIR