1275631007: Developmental and epileptic encephalopathy (disorder)

SNOMED CT Concept\Clinical finding (finding)\...

\Head finding (finding)\Finding of brain\Seizure\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Head finding (finding)\Finding of brain\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Head finding (finding)\Disorder of head (disorder)\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.

\Central nervous system finding\Finding of brain\Seizure\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Central nervous system finding\Finding of brain\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Central nervous system finding\Disorder of the central nervous system (disorder)\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.

\Neurological finding\Seizure related finding\Seizure\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.

\Disease\Disorder of body system\Disorder of nervous system (disorder)\Disorder of the central nervous system (disorder)\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Disease\Disorder of head (disorder)\Disorder of brain (disorder)\Seizure disorder\A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.
\Disease\Developmental disorder\Neurodevelopmental disorder is a behavioral and cognitive disorder with onset during the developmental period that involves impaired or aberrant development of intellectual, motor, or social functions.\A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-May 2023. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

5224365012 A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone. en Definition Active Entire term case sensitive (core metadata concept) SNOMED CT core

5224366013 A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying aetiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioural impairments above and beyond what might be expected from the underlying pathology alone. en Definition Active Entire term case sensitive (core metadata concept) SNOMED CT core

5224367016 DEE - developmental and epileptic encephalopathy en Synonym (core metadata concept) Active Entire term case sensitive (core metadata concept) SNOMED CT core

5224368014 Developmental and epileptic encephalopathy en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

5224369018 Developmental and epileptic encephalopathy (disorder) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Is a	Neurodevelopmental disorder is a behavioral and cognitive disorder with onset during the developmental period that involves impaired or aberrant development of intellectual, motor, or social functions.	true	Inferred relationship	Some
A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Is a	A disease of the brain characterized by an enduring predisposition to generate epileptic seizures.	true	Inferred relationship	Some
A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Finding site	Brain structure	true	Inferred relationship	Some	1
A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Pathological process (attribute)	Pathological developmental process	true	Inferred relationship	Some	1

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Myoclonic encephalopathy	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Early infantile epileptic encephalopathy with suppression bursts	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Epilepsy with continuous spike wave during slow-wave sleep	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Early-onset epileptic encephalopathy and intellectual disability due to GRIN2A mutation is a rare intellectual disability and epilepsy syndrome characterized by global developmental delay and mild to profound intellectual disability, multiple types of usually intractable focal and generalized seizures with variable abnormal EEG findings, and bilateral progressive parenchymal volume loss and thin corpus callosum on brain MRI.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A type of epilepsy that presents with myoclonic-atonic seizures usually between 2 to 6 years of age. Other generalised seizure types which may be seen in this syndrome include atonic, myoclonic, generalised tonic-clonic seizures, tonic and absence seizures. Nonconvulsive status epilepticus is common. Development prior to seizure onset is normal in two thirds of cases. These children typically show developmental stagnation or even regression during the active seizures (stormy) phase, which improves once seizures are controlled. The electroencephalogram shows generalised 2 to 6 Hz spike-wave or polyspike-and-wave abnormalities, with normal background.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare, genetic, developmental and epileptic encephalopathy characterized by infantile onset of intractable seizures that are often febrile, and associated with cognitive and motor impairment.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Early myoclonic encephalopathy	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Lennox-Gastaut syndrome	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare monogenic disease with epilepsy characterized by developmental delay and infantile spasms in the first months of life, followed by chorea and generalized dystonia and progressing to quadriplegic dyskinesia, recurrent status dystonicus, intractable focal epilepsy and severe intellectual disability.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare, congenital disorder of glycosylation characterized by severe or profound global developmental delay, early epileptic encephalopathy, muscular hypotonia, dysmorphic features (coarse facies, thick eyebrows, broad nasal bridge, thick lips, inverted nipples), variable ocular defects and brain morphological abnormalities on brain MRI (cerebral atrophy, thin corpus callosum).	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Early-onset epileptic encephalopathy-cortical blindness-intellectual disability-facial dysmorphism syndrome is a rare, syndromic intellectual disability syndrome characterized by cortical blindness, different types of seizures, intellectual disability with limited or absent speech, and dysmorphic facial features. Brain imaging typically shows mild pontine hypoplasia, hypoplasia of the corpus callosum and atrophy in the occipital region.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare, genetic, lethal, neurometabolic malformation syndrome characterized by multiple, variable, congenital cardiac (systolic murmur, atrial septal defect), urinary (duplicated collecting system, vesicoureteral reflux) and central nervous system (thin corpus callosum, cerebellar hypoplasia) malformations associated with neonatal hypotonia, early-onset epileptic encephalopathy, and myoclonic seizures. Craniofacial dysmorphism (prominent occiput, enlarged fontanel, fused metopic suture, upslanted palpebral fissures, overfolded helix, depressed nasal bridge, anteverted nose, malar flattening, microstomia with downturned corners, Pierre-Robin sequence, high arched palate, short neck) and other manifestations (joint contractures, hyperreflexia, dysplastic nails, developmental delay) are also observed.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Epileptic encephalopathy with global cerebral demyelination is a rare mitochondrial substrate carrier disorder characterized by severe muscular hypotonia, seizures (with or without episodic apnea) beginning in the first year of life, and arrested psychomotor development (affecting mainly motor skills). Severe spasticity with hyperreflexia has also been reported. Global cerebral hypomyelination is a characteristic imaging feature of this disease.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
KCNQ2-related epileptic encephalopathy is a severe form of neonatal epilepsy that usually manifests in newborns during the first week of life with seizures (that affect alternatively both sides of the body), often accompanied by clonic jerking or more complex motor behavior, as well as signs of encephalopathy such as diffuse hypotonia, limb spasticity, lack of visual fixation and tracking and mild to moderate intellectual deficiency. The severity can range from controlled to intractable seizures and mild/moderate to severe intellectual disability.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare, genetic, mitochondrial oxidative phosphorylation disorder characterized by infantile onset encephalomyopathy presenting with developmental delay, slowly progressive hemiplegia, intractable epileptic seizures and asymmetrical brain atrophy with dilatation of the ipsilateral ventricle system. Additional features include optic atrophy, mildly increased plasma and/or CSF lactate and decreased cytochrome c oxidase activity in skeletal muscle biopsy.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare epilepsy syndrome characterized by recurrent, long-lasting myoclonic status in infants and young children with a non-progressive encephalopathy, associated with transient and recurring motor, cognitive and/or behavioral disturbances.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Primary microcephaly-epilepsy-permanent neonatal diabetes syndrome is a rare, genetic, neurologic disease characterized by congenital microcephaly, severe, early-onset epileptic encephalopathy (manifesting as intractable, myoclonic and/or tonic-clonic seizures), permanent, neonatal, insulin-dependent diabetes mellitus, and severe global developmental delay. Muscular hypotonia, skeletal abnormalities, feeding difficulties, and dysmorphic facial features (including narrow forehead, anteverted nares, small mouth with deep philtrum, tented upper lip vermilion) are frequently associated. Brain MRI reveals cerebral atrophy with cortical gyral simplification and aplasia/hypoplasia of the corpus callosum.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare, X-linked, syndromic intellectual disability disease characterized by neonatal hypertonia which evolves to hypotonia and an exaggerated startle response (to sudden visual, auditory or tactile stimuli), followed by the development of early-onset, frequently refractory, tonic or myoclonic seizures. Progressive epileptic encephalopathy, intellectual disability, and psychomotor development arrest, with subsequent decline, may be additionally associated.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare mitochondrial oxidative phosphorylation disorder characterized by a variable clinical phenotype including infantile onset of epileptic encephalopathy, hypotonia, global developmental delay, failure to thrive, complex movement disorder, and liver involvement, as well as childhood onset of severe myoclonus epilepsy, cognitive decline, progressive hearing and visual impairment, and progressive tetraparesis. Serum lactate may be increased, and brain imaging shows variable atrophy and white matter abnormalities.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare genetic neurological disorder characterized by neonatal onset of rigidity and intractable seizures, with episodic jerking already beginning in utero. Affected infants have small heads, remain visually inattentive, do not feed independently, and make no developmental progress. Frequent spontaneous apnea and bradycardia usually culminate in cardiopulmonary arrest and death in infancy, although some cases were described with a milder clinical course and survival into childhood.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare mitochondrial disease characterized by infantile onset of severe regression after a period of normal development, epileptic encephalopathy, hypotonia, movement disorder, cardiomyopathy, hyperglycinemia, and lactic acidosis. Optic atrophy may also be present. Brain imaging findings are highly variable and include white matter abnormalities. The disease is typically fatal in infancy.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare congenital disorder of glycosylation caused by mutations in the CAD gene and characterized by epileptic encephalopathy, global developmental delay, normocytic anemia and anisopoikilocytosis. Loss of acquired skills in early childhood is present and natural disease course can be lethal in early childhood.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare genetic developmental and epileptic encephalopathy (DEE) characterized by developmental delay, generalized epilepsy consisting of eyelid myoclonia with absences and myoclonic-atonic seizures, intellectual disability and autism spectrum disorder (ASD).	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by congenital microcephaly, infantile-onset epileptic encephalopathy, and profound developmental delay. Additional reported features include cortical visual impairment, sensorineural hearing loss, increased muscle tone, limb contractures, scoliosis, and dysmorphic features like midface hypoplasia, narrow forehead, short nose, narrowed nasal bridge, and small chin. Brain imaging may show thin corpus callosum and delayed myelination.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare genetic neurometabolic disease characterized by early neonatal refractory seizures, hypotonia, and respiratory failure. Brain imaging reveals simplified gyral pattern of the frontal lobes, white matter abnormalities, gliosis and volume loss in various brain regions, and vasogenic edema. Serum glutamine levels are significantly elevated. Death occurs within weeks after birth.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
A rare genetic syndromic neurodevelopmental disorder with characteristics of moderate to mostly severe intellectual disability, speech impairment with normal or mildly delayed motor development and early-onset seizures often accompanied by developmental regression. Autistic behaviour and stereotypic movements are common. The disorder is caused by bi-allelic intragenic deletions (rarely duplications) or truncating variants in the CNTNAP2 gene (7q35-q36.1). It encodes contactin-associated protein 2 (CASPR2), a transmembrane protein from the neurexin superfamily, which is involved in neural-glia interactions and clustering of potassium channels in myelinated axons. Inheritance is autosomal recessive.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Hypothalamic hamartomas with gelastic seizures is a rare cerebral malformation with epilepsy syndrome characterized by early-onset gelastic (i.e. ictal laughter) or dacrystic (i.e., ictal crying) seizures due to non-neoplastic developmental malformation - hypothalamic hamartomas. In many patients, seizures progress to other seizure types including focal and generalized seizures, with concomitant cognitive decline and behavioral disorders. Some patients also present a precocious puberty.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Folinic acid-responsive seizures is a very rare neonatal epileptic encephalopathy disorder characterized clinically by myoclonic and clonic, or clonic seizures associated with apnea occurring several hours to 5 days after birth and responding to folinic acid.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Severe neonatal-onset encephalopathy with microcephaly is a rare monogenic disease with epilepsy characterized by neonatal-onset encephalopathy, microcephaly, severe developmental delay or absent development, breathing abnormalities (including central hypoventilation and/or respiratory insufficiency), intractable seizures, abnormal muscle tone and involuntary movements. Early death is usual.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some
Infantile-onset mesial temporal lobe epilepsy with severe cognitive regression is a rare monogenic disease with infantile-onset pharmacoresistant focal seizures of mesial temporal lobe onset manifesting with unresponsiveness, hypertonia and automatisms and cognitive regression soon after seizure onset leading to severe intellectual disability with behavioral abnormalities.	Is a	True	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	Inferred relationship	Some

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Id	Description	Lang	Type	Status	Case?	Module
5224365012	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying etiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioral impairments above and beyond what might be expected from the underlying pathology alone.	en	Definition	Active	Entire term case sensitive (core metadata concept)	SNOMED CT core
5224366013	A type of epilepsy associated with developmental impairment where the developmental impairment is due to both the underlying aetiology, independent of epileptic activity, and the superimposed epileptic encephalopathy. An epileptic encephalopathy is where the epileptic activity itself contributes to severe cognitive and behavioural impairments above and beyond what might be expected from the underlying pathology alone.	en	Definition	Active	Entire term case sensitive (core metadata concept)	SNOMED CT core
5224367016	DEE - developmental and epileptic encephalopathy	en	Synonym (core metadata concept)	Active	Entire term case sensitive (core metadata concept)	SNOMED CT core
5224368014	Developmental and epileptic encephalopathy	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
5224369018	Developmental and epileptic encephalopathy (disorder)	en	Fully specified name	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core