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Items: 1 to 20 of 55

1.

Frequency

MedGen UID:
91210
Concept ID:
C0376249
Temporal Concept
2.

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 GeneReviews]

MedGen UID:
48441
Concept ID:
C0035372
Disease or Syndrome
3.

Microcephalus

Occipito-frontal (head) circumference (OFC) less than -3 standard deviations compared to appropriate, age matched, normal standards (Ross JJ, Frias JL 1977, PMID:9683597). Alternatively, decreased size of the cranium. [from HPO]

MedGen UID:
44422
Concept ID:
C0025958
Congenital Abnormality
4.

Unspecified encephalopathy

Encephalopathy is a term that means brain disease, damage, or malfunction. In general, encephalopathy is manifested by an altered mental state. [from HPO]

MedGen UID:
39314
Concept ID:
C0085584
Disease or Syndrome
5.

Strabismus

Strabismus (also known as squint) is a condition in which the eyes are not properly aligned with each other. [from HPO]

MedGen UID:
21337
Concept ID:
C0038379
Disease or Syndrome; Finding
6.

Syndrome

A set of symptoms or conditions that occur together and suggest the presence of a certain disease or an increased chance of developing the disease. [from NCI_NCI-GLOSS]

MedGen UID:
11688
Concept ID:
C0039082
Disease or Syndrome
7.

severe microcephaly

MedGen UID:
851842
Concept ID:
CN233212
Finding
8.

Intellectual disability

Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual has an intellectual disability. IQ scores between 70 and 79 are in the borderline range. Scores below 67 are in the disabled range. (from Joynt, Clinical Neurology, 1992, Ch55, p28) [from MeSH]

MedGen UID:
811461
Concept ID:
C3714756
Mental or Behavioral Dysfunction
9.

Borries syndrome

MedGen UID:
542920
Concept ID:
C0270677
Disease or Syndrome
10.

Microcephaly

Occipito-frontal (head) circumference (OFC) less than -3 standard deviations compared to appropriate, age matched, normal standards (Ross JJ, Frias JL 1977, PMID:9683597). Alternatively, decreased size of the cranium. [from HPO]

MedGen UID:
473122
Concept ID:
C0424688
Finding
11.

Nonsyndromic microcephaly

MedGen UID:
419828
Concept ID:
C2931527
Disease or Syndrome
12.

Encephalopathy

MedGen UID:
368408
Concept ID:
C1963101
Finding
13.

Susceptibility to strabismus

Strabismus, a misalignment of the eyes also referred to as 'squint,' is one of the most common ocular disorders in humans, affecting 1 to 4% of the population. It is frequently associated with amblyopia (uniocular visual neglect) (Parikh et al., 2003). Strabismus is also a feature of several syndromic syndromes, including congenital fibrosis of extraocular muscles (see, e.g., FEOM1; 135700), Duane retraction syndrome (126800), and chronic progressive external ophthalmoplegia (530000). [from OMIM]

MedGen UID:
350026
Concept ID:
C1861449
Disease or Syndrome
14.

Generalized hypotonia

Generalized muscular hypotonia (abnormally low muscle tone). [from HPO]

MedGen UID:
346841
Concept ID:
C1858120
Finding
15.

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:
334384
Concept ID:
C1843367
Finding
16.

Severe muscular hypotonia

A severe degree of muscular hypotonia characterized by markedly reduced muscle tone. [from HPO]

MedGen UID:
326544
Concept ID:
C1839630
Finding
17.

Delayed myelination

Delayed myelination. [from HPO]

MedGen UID:
224820
Concept ID:
C1277241
Finding
18.

Hypoplasia of the corpus callosum

Underdevelopment of the corpus callosum. [from HPO]

MedGen UID:
138005
Concept ID:
C0344482
Congenital Abnormality
19.

Proliferation

MedGen UID:
137720
Concept ID:
C0334094
Pathologic Function
20.

Severe

Having a high degree of severity. For quantitative traits, a deviation of between four and five standard deviations from the appropriate population mean. [from HPO]

MedGen UID:
104640
Concept ID:
C0205082
Qualitative Concept
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