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Items: 1 to 20 of 34

1.

Epileptic Syndromes

EPILEPTIC SEIZURES that are of similar type and age of onset and have other similar features (e.g., clinical course, EEG findings, genetic association and neuropathology). [from MeSH]

MedGen UID:
1371141
Concept ID:
C4505072
Disease or Syndrome
2.

Intellectual disability

Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70. [from HPO]

MedGen UID:
811461
Concept ID:
C3714756
Mental or Behavioral Dysfunction
3.

X-linked hereditary disease

Genetic diseases that are linked to gene mutations on the X CHROMOSOME in humans (X CHROMOSOME, HUMAN) or the X CHROMOSOME in other species. Included here are animal models of human X-linked diseases. [from MeSH]

MedGen UID:
222910
Concept ID:
C1138434
Disease or Syndrome
4.

Mental deficiency

Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70. [from HPO]

MedGen UID:
214593
Concept ID:
C0917816
Mental or Behavioral Dysfunction
5.

Mental Retardation, X Linked

A class of genetic disorders resulting in INTELLECTUAL DISABILITY that is associated either with mutations of GENES located on the X CHROMOSOME or aberrations in the structure of the X chromosome (SEX CHROMOSOME ABERRATIONS). [from MeSH]

MedGen UID:
211749
Concept ID:
C1136249
Disease or Syndrome
6.

Progressive myoclonic epilepsy

A heterogeneous group of primarily familial EPILEPSY disorders characterized by myoclonic seizures, tonic-clonic seizures, ataxia, progressive intellectual deterioration, and neuronal degeneration. These include LAFORA DISEASE; MERRF SYNDROME; NEURONAL CEROID-LIPOFUSCINOSIS; sialidosis (see MUCOLIPIDOSES), and UNVERRICHT-LUNDBORG SYNDROME. [from MeSH]

MedGen UID:
199732
Concept ID:
C0751778
Disease or Syndrome
7.

Inborn genetic diseases

Diseases that are caused by genetic mutations present during embryo or fetal development, although they may be observed later in life. The mutations may be inherited from a parent's genome or they may be acquired in utero. [from MeSH]

MedGen UID:
181981
Concept ID:
C0950123
Disease or Syndrome
8.

Myoclonic epilepsy, familial infantile

TBC1D24-related disorders comprise a continuum of features that were originally described as distinct, recognized phenotypes: DOORS syndrome (deafness, onychodystrophy, osteodystrophy, mental retardation, and seizures). Profound sensorineural hearing loss, onychodystrophy, osteodystrophy, intellectual disability/developmental delay, and seizures. Familial infantile myoclonic epilepsy (FIME). Early-onset myoclonic seizures, focal epilepsy, dysarthria, and mild-to-moderate intellectual disability. Progressive myoclonus epilepsy (PME). Action myoclonus, tonic-clonic seizures, progressive neurologic decline, and ataxia. Early-infantile epileptic encephalopathy 16 (EIEE16). Epileptiform EEG abnormalities which themselves are believed to contribute to progressive disturbance in cerebral function. Autosomal recessive nonsyndromic hearing loss, DFNB86. Profound prelingual deafness. Autosomal dominant nonsyndromic hearing loss, DFNA65. Slowly progressive deafness with onset in the third decade, initially affecting the high frequencies. [from GTR]

MedGen UID:
181488
Concept ID:
C0917800
Disease or Syndrome
9.

Heredodegenerative Disorders, Nervous System

Inherited disorders characterized by progressive atrophy and dysfunction of anatomically or physiologically related neurologic systems. [from MeSH]

MedGen UID:
155945
Concept ID:
C0751870
Disease or Syndrome
10.

Severe myoclonic epilepsy in infancy

SCN1A-related seizure disorders encompass a spectrum that ranges from simple febrile seizures (FS) and generalized epilepsy with febrile seizures plus (GEFS+) at the mild end to Dravet syndrome and intractable childhood epilepsy with generalized tonic-clonic seizures (ICE-GTC) at the severe end. Phenotypes with intractable seizures including Dravet syndrome (also known as severe myoclonic epilepsy in infancy [SMEI] or polymorphic myoclonic epilepsy in infancy [PMEI]) are usually associated with progressive dementia. Less commonly observed phenotypes include myoclonic-astatic epilepsy (MAE or Doose syndrome), Lennox-Gastaut syndrome (LGS), infantile spasms, and vaccine-related encephalopathy and seizures. The phenotype of SCN1A-related seizure disorders can vary even within the same family. [from GTR]

MedGen UID:
148243
Concept ID:
C0751122
Disease or Syndrome
11.

Epileptic seizures - akinetic

MedGen UID:
138083
Concept ID:
C0347869
Disease or Syndrome
12.

Neurobehavioral Manifestations

Signs and symptoms of higher cortical dysfunction caused by organic conditions. These include certain behavioral alterations and impairments of skills involved in the acquisition, processing, and utilization of knowledge or information. [from MeSH]

MedGen UID:
105653
Concept ID:
C0525041
Sign or Symptom
13.

Auras

Subjective ictal phenomena that, in a given patient, may precede observable seizures; if alone, constitute a if alone, constitute a simple partial seizure. [from HPO]

MedGen UID:
65921
Concept ID:
C0236018
Finding
14.

Rett syndrome

MECP2-related disorders in females include classic Rett syndrome, variant Rett syndrome, and mild learning disabilities. A pathogenic MECP2 variant in a male is presumed to most often be lethal; phenotypes in rare surviving males are primarily severe neonatal encephalopathy and manic-depressive psychosis, pyramidal signs, Parkinsonian, and macro-orchidism (PPM-X syndrome). Classic Rett syndrome, a progressive neurodevelopmental disorder primarily affecting girls, is characterized by apparently normal psychomotor development during the first six to 18 months of life, followed by a short period of developmental stagnation, then rapid regression in language and motor skills, followed by long-term stability. During the phase of rapid regression, repetitive, stereotypic hand movements replace purposeful hand use. Additional findings include fits of screaming and inconsolable crying, autistic features, panic-like attacks, bruxism, episodic apnea and/or hyperpnea, gait ataxia and apraxia, tremors, seizures, and acquired microcephaly. Atypical Rett syndrome is observed increasingly as MECP2 variants are identified in individuals previously diagnosed with: clinically suspected but molecularly unconfirmed Angelman syndrome; intellectual disability with spasticity or tremor; mild learning disability; or (rarely) autism. Severe neonatal encephalopathy resulting in death before age two years is the most common phenotype observed in affected males. [from GTR]

MedGen UID:
48441
Concept ID:
C0035372
Disease or Syndrome
15.

Intellectual disability, profound

Profound mental retardation is defined as an intelligence quotient (IQ) below 20. [from HPO]

MedGen UID:
43816
Concept ID:
C0020796
Finding; Mental or Behavioral Dysfunction
16.

Epilepsy, Cryptogenic

MedGen UID:
39409
Concept ID:
C0086237
Disease or Syndrome
17.

Atonic epilepsy

MedGen UID:
39408
Concept ID:
C0086236
Disease or Syndrome
18.

Unspecified encephalopathy

A functional and/or structural disorder of the brain caused by diseases (e.g. liver disease, kidney disease), medications, chemicals, and injuries. [from NCI]

MedGen UID:
39314
Concept ID:
C0085584
Disease or Syndrome
19.

Epileptic seizures - tonic

MedGen UID:
39186
Concept ID:
C0086241
Disease or Syndrome
20.

Neurologic Manifestations

Clinical signs and symptoms caused by nervous system injury or dysfunction. [from MeSH]

MedGen UID:
18017
Concept ID:
C0027854
Finding
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