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Items: 1 to 20 of 48

1.

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
2.

Leigh syndrome

Leigh syndrome is an early-onset progressive neurodegenerative disorder with a characteristic neuropathology consisting of focal, bilateral lesions in one or more areas of the central nervous system, including the brainstem, thalamus, basal ganglia, cerebellum, and spinal cord. The lesions are areas of demyelination, gliosis, necrosis, spongiosis, or capillary proliferation. Clinical symptoms depend on which areas of the central nervous system are involved. The most common underlying cause is a defect in oxidative phosphorylation (Dahl, 1998). Leigh syndrome may be a feature of a deficiency of any of the mitochondrial respiratory chain complexes: complex I deficiency (252010), complex II deficiency (252011), complex III deficiency (124000), complex IV deficiency (cytochrome c oxidase; 220110), or complex V deficiency (604273). [from OMIM]

MedGen UID:
44095
Concept ID:
C0023264
Disease or Syndrome
3.

enzyme activity

Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic. [ISBN:0198506732] [from GO]

MedGen UID:
66218
Concept ID:
C0243102
Molecular Function
4.

Onset

The age group in which disease manifestations appear. [from HPO]

MedGen UID:
64519
Concept ID:
C0206132
Quantitative Concept
5.

Respiratory Chain

MedGen UID:
57891
Concept ID:
C0162362
Molecular Function
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]

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

Diagnosis

The process of identifying a disease, such as cancer, from its signs and symptoms. [from NCI]

MedGen UID:
8354
Concept ID:
C0011900
Finding
8.

Borries syndrome

MedGen UID:
542920
Concept ID:
C0270677
Disease or Syndrome
9.

NADH:Q(1) Oxidoreductase deficiency

MedGen UID:
423638
Concept ID:
C2936907
Disease or Syndrome
10.

History of previous events

The aggregate of past events; the continuum of events occurring in succession leading from the past to the present; a record or narrative description of past events. [from NCI]

MedGen UID:
389153
Concept ID:
C2004062
Finding
11.

Encephalopathy, mitochondrial

MedGen UID:
342221
Concept ID:
C1852373
Disease or Syndrome
12.

Mitochondrial inheritance

A mode of inheritance that is observed for traits related to a gene encoded on the mitochondrial genome. Because the mitochondrial genome is essentially always maternally inherited, a mitochondrial condition can only be transmitted by females, although the condition can affect both sexes. The proportion of mutant mitochondria can vary (heteroplasmy). [from HPO]

MedGen UID:
165802
Concept ID:
C0887941
Genetic Function
13.

Mitochondrial diseases

Mitochondrial diseases are a clinically heterogeneous group of disorders that arise as a result of dysfunction of the mitochondrial respiratory chain. They can be caused by mutation of genes encoded by either nuclear DNA or mitochondrial DNA (mtDNA). While some mitochondrial disorders only affect a single organ (e.g., the eye in Leber hereditary optic neuropathy [LHON]), many involve multiple organ systems and often present with prominent neurologic and myopathic features. Mitochondrial disorders may present at any age. Many individuals with a mutation of mtDNA display a cluster of clinical features that fall into a discrete clinical syndrome, such as the Kearns-Sayre syndrome (KSS), chronic progressive external ophthalmoplegia (CPEO), mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes (MELAS), myoclonic epilepsy with ragged-red fibers (MERRF), neurogenic weakness with ataxia and retinitis pigmentosa (NARP), or Leigh syndrome (LS). However, considerable clinical variability exists and many individuals do not fit neatly into one particular category, which is well-illustrated by the overlapping spectrum of disease phenotypes (including mitochondrial recessive ataxia syndrome (MIRAS) resulting from mutation of the nuclear gene POLG, which has emerged as a major cause of mitochondrial disease. Common clinical features of mitochondrial disease – whether involving a mitochondrial or nuclear gene – include ptosis, external ophthalmoplegia, proximal myopathy and exercise intolerance, cardiomyopathy, sensorineural deafness, optic atrophy, pigmentary retinopathy, and diabetes mellitus. Common central nervous system findings are fluctuating encephalopathy, seizures, dementia, migraine, stroke-like episodes, ataxia, and spasticity. A high incidence of mid- and late pregnancy loss is a common occurrence that often goes unrecognized. [from GeneReviews]

MedGen UID:
155901
Concept ID:
C0751651
Disease or Syndrome
14.

Suffering

State of severe distress associated with events that threaten the intactness of the person, can be physical, mental, or emotional. [from SNOMEDCT_US]

MedGen UID:
151916
Concept ID:
C0683278
Mental or Behavioral Dysfunction
15.

Functional disorder

Deranged function in an individual or an organ that is due to a disease. (MedicineNet.com) [from NCI]

MedGen UID:
124450
Concept ID:
C0277785
Pathologic Function; Qualitative Concept
16.

History of

A collection of information about a person's health. It may include information about allergies, illnesses and surgeries, and dates and results of physical exams, tests, screenings, and immunizations. It may also include information about medicines taken and about diet and exercise. [from NCI]

MedGen UID:
82657
Concept ID:
C0262926
Finding
17.

Cytochrome-c oxidase deficiency

Complex IV (cytochrome c oxidase; EC 1.9.3.1) is the terminal enzyme of the respiratory chain and consists of 13 polypeptide subunits, 3 of which are encoded by mitochondrial DNA. The 3 mitochondrially encoded proteins in the cytochrome oxidase complex are the actual catalytic subunits that carry out the electron transport function (Saraste, 1983). See 123995 for discussion of some of the nuclear-encoded subunits. Shoubridge (2001) provided a comprehensive review of cytochrome c oxidase deficiency and noted that most isolated COX deficiencies are inherited as autosomal recessive disorders caused by mutations in nuclear-encoded genes; mutations in the mtDNA-encoded COX subunit genes are relatively rare. [from OMIM]

MedGen UID:
75662
Concept ID:
C0268237
Congenital Abnormality; Disease or Syndrome
18.

Striadyne

MedGen UID:
196163
Concept ID:
C0701945
Biologically Active Substance; Nucleic Acid, Nucleoside, or Nucleotide; Pharmacologic Substance
19.

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
20.

Brain Diseases, Metabolic, Inborn

Brain disorders resulting from inborn metabolic errors, primarily from enzymatic defects which lead to substrate accumulation, product reduction, or increase in toxic metabolites through alternate pathways. The majority of these conditions are familial, however spontaneous mutation may also occur in utero. [from MeSH]

MedGen UID:
156005
Concept ID:
C0752109
Disease or Syndrome
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