{"Name":"Usher syndrome type 2","DiseaseID__c":"GARD:0005440","id":5440,"encodedName":"usher-syndrome-type-2","IsDeleted":false,"Disease_Name_Full__c":"Usher syndrome type 2","Xref_IDs__c":"232058008; C0339534; C126328; DOID:0110827; MEDGEN:83288; MONDO:0016484; NBK1341; ORPHA:231178","USA_Estimate__c":"50,000","No_of_Specialist_Tagsa__c":5,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":1,"No_of_HHS_records__c":0,"World_Estimate__c":"80,000 to 800,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":2,"No_of_Disease_Descriptions__c":3,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0016484","Disease_Description__c":"A syndrome characterized by congenital, bilateral sensorineural hearing loss that is mild to moderate in the low frequencies and severe to profound in the higher frequencies, no abnormalities in the vestibular system, and retinitis pigmentosa.","GARD_Name__c":"Usher syndrome type 2","GARD_Synonym__c":"ush2; usher syndrome type ii","Curated_Disease_Description_Source__c":"GARD:0005440","Curated_Disease_Description__c":"Usher syndrome type 2A is a genetic condition characterized by hearing loss from birth and progressive vision loss that usually begins in adolescence or adulthood. Vision loss is due to retinitis pigmentosa. Night vision loss begins first, followed by blind spots that develop in the side (peripheral) vision. Over time, these blind spots enlarge and merge to produce tunnel vision. In some cases, vision is further impaired by clouding of the front surface of the eye (cataracts). Hearing loss ranges from mild to severe and mainly affects high tones. The degree of hearing loss varies within and among families with this condition. Unlike other forms of Usher syndrome, people with type 2A do not have difficulties with balance caused by inner ear problems. Usher syndrome type 2A is caused by genetic changes the USH2A gene and is inherited in an autosomal recessive manner.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"50,000","Age_at_Onset_Snippet_Text__c":"as a Newborn and as an Infant","SourceID__c":"ORPHA:231178","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Grouping","MONDO_ID__c":"MONDO:0016484","ORPHANET_ID__c":"ORPHA:231178","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Síndrome de usher tipo 2","Spanish_Description_Source__c":null,"Spanish_Description__c":null,"Spanish_Disease_Name__c":"síndrome de usher tipo 2","Spanish_GARD_Synonym__c":"ush2","Category_Linearization__c":"ORPHA:93890","icd10_id__c":null,"mesh_id__c":null,"omim_id__c":null,"snomed_id__c":null,"umls_id__c":null,"GARD_Disease__c":[{"Curated_Disease_Description__c":"Usher syndrome type 2A is a genetic condition characterized by hearing loss from birth and progressive vision loss that usually begins in adolescence or adulthood. Vision loss is due to retinitis pigmentosa. Night vision loss begins first, followed by blind spots that develop in the side (peripheral) vision. Over time, these blind spots enlarge and merge to produce tunnel vision. In some cases, vision is further impaired by clouding of the front surface of the eye (cataracts). Hearing loss ranges from mild to severe and mainly affects high tones. The degree of hearing loss varies within and among families with this condition. Unlike other forms of Usher syndrome, people with type 2A do not have difficulties with balance caused by inner ear problems. Usher syndrome type 2A is caused by genetic changes the USH2A gene and is inherited in an autosomal recessive manner.","Curated_Disease_Description_Source__c":"GARD:0005440","GARD_Synonym__c":"ush2; usher syndrome type ii","Name":"Usher syndrome type 2","Curated_USA_Estimate__c":"50,000","estimateUsa":"50,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Retina International","Website__c":"https://retina-international.org/"},{"Account_Name__c":"Foundation Fighting Blindness","Website__c":"https://www.fightingblindness.org/"},{"Account_Name__c":"Usher Syndrome Coalition","Website__c":"https://www.usher-syndrome.org/"}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"Ophthalmology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Congenital Abnormality","Tag_Category__c":"Disease Category","category_description":"Birth defects are structural changes present at birth that can affect almost any part of the body, including how the body looks, works, or both.","curated_tag_name":"Birth defects"},{"Tag_Name__c":"Otolaryngology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Retinal","Tag_Category__c":"Account;Specialist","curated_tag_name":"Retinal disorders"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Neonatal","Provided_By__c":"ORPHA:231178"},{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:231178"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C1848634"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0005440","Source__c":"RareSource"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1341","Source__c":"Gene Review","Xref__c":"NBK1341"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=83288","Source__c":"C0339534","Xref__c":"MEDGEN:83288"},{"URL__c":"https://www.orpha.net/en/disease/detail/231178","Source__c":"C0339534; MONDO:0016484; ORPHA:231178","Xref__c":"ORPHA:231178"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0110827","Source__c":"MONDO:0016484","Xref__c":"DOID:0110827"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C0339534","Source__c":"C0339534","Xref__c":"C0339534"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C126328","Source__c":"C0339534; MONDO:0016484","Xref__c":"C126328"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=232058008","Source__c":"C0339534; MONDO:0016484","Xref__c":"232058008"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0016484","Source__c":"GARD:0005440","Xref__c":"MONDO:0016484"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"WHRN","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"ADGRV1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MYO7A","GHR_URL__c":"https://medlineplus.gov/genetics/gene/myo7a","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"USH2A","GHR_URL__c":"https://medlineplus.gov/genetics/gene/ush2a","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormality of the inner ear.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000359","HPO_Synonym__c":"Abnormality of the inner ear; Inner ear abnormality","HPO_Name__c":"Abnormality of the inner ear","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Any abnormality of the electrical responses of various cell types in the retina as measured by electroretinography.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000512","HPO_Synonym__c":"Abnormal electroretinography; Abnormal ERG; ERG abnormal","HPO_Name__c":"Abnormal electroretinogram","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal reduction in the amount of pigmentation of the iris.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007730","HPO_Synonym__c":"Light eye color; Reduced iris pigmentation","HPO_Name__c":"Iris hypopigmentation","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Intense feelings of nervousness, tension, or panic often arise in response to interpersonal stresses. There is worry about the negative effects of past unpleasant experiences and future negative possibilities. Individuals may feel fearful, apprehensive, or threatened by uncertainty, and they may also have fears of falling apart or losing control.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000739","HPO_Synonym__c":"Anxiety; Anxiousness; Excessive, persistent worry and fear","HPO_Name__c":"Anxiety","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A regional and pathological increase of the light detection threshold in any region of the visual field surrounded by a field of normal or relatively well-preserved vision.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000575","HPO_Name__c":"Scotoma","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Frequently experiencing feelings of being down, miserable, and/or hopeless; struggling to recover from these moods; having a pessimistic outlook on the future; feeling a pervasive sense of shame; having a low self-worth; experiencing thoughts of suicide and engaging in suicidal behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000716","HPO_Synonym__c":"Depression; Depressive episode; Depressivity","HPO_Name__c":"Depression","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Inability to see well at night or in poor light.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000662","HPO_Synonym__c":"Night blindness; Night-blindness; Poor night vision","HPO_Name__c":"Nyctalopia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Loss of visual acuity (implying that vision was better at a certain time point in life). Otherwise the term reduced visual acuity should be used (or a subclass of that).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000572","HPO_Synonym__c":"Loss of vision; Vision loss; Visual loss","HPO_Name__c":"Visual loss","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A type of hearing impairment in one or both ears related to an abnormal functionality of the cochlear nerve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000407","HPO_Synonym__c":"Hearing loss, sensorineural; Sensorineural deafness; Sensorineural hearing loss","HPO_Name__c":"Sensorineural hearing impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000545","HPO_Synonym__c":"Close sighted; Near sighted; Near sightedness; Nearsightedness","HPO_Name__c":"Myopia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000518","HPO_Synonym__c":"Cataracts; Clouding of the lens of the eye; Cloudy lens; Lens opacities; Lens opacity","HPO_Name__c":"Cataract","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"An abnormality of the functioning of the vestibular apparatus.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001751","HPO_Synonym__c":"Impaired vestibular function; Interictal vestibular dysfunction; Vestibular function defect","HPO_Name__c":"Abnormal vestibular function","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An anomaly in the ability to discriminate between or recognize colors.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000551","HPO_Synonym__c":"Abnormal color vision; Abnormality of color vision; Disturbed color vision","HPO_Name__c":"Color vision defect","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007663","HPO_Synonym__c":"Decreased central vision; Decreased clarity of vision; Decreased visual acuity; Poor visual acuity","HPO_Name__c":"Reduced visual acuity","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormal pattern in the quality, quantity, or characteristics of sleep.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002360","HPO_Synonym__c":"Difficulty sleeping; Sleep abnormality; Sleep disturbances; Sleep dysfunction; Sleep-wake disturbance; Trouble sleeping","HPO_Name__c":"Sleep disturbance","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality in perception of contrast. Spatial contrast is a physical dimension referring to the light-dark transition of a border or an edge in an image that delineates the existence of a pattern or an object. Contrast sensitivity refers to a measure of how much contrast a person requires to see a target. Contrast-sensitivity measurements differ from acuity measurements; acuity is a measure of the spatial-resolving ability of the visual system under conditions of very high contrast, whereas contrast sensitivity is a measure of the threshold contrast for seeing a target.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0032036","HPO_Synonym__c":"Abnormal contrast sensitivity","HPO_Name__c":"Reduced contrast sensitivity","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A subjective feeling of tiredness characterized by a lack of energy and motivation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012378","HPO_Synonym__c":"Fatigue; Tired; Tiredness","HPO_Name__c":"Fatigue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007994","HPO_Synonym__c":"Kalnienk vision; Loss of peripheral vision","HPO_Name__c":"Peripheral visual field loss","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002141","HPO_Synonym__c":"Abnormality of balance; Abnormality of equilibrium; Imbalanced walk","HPO_Name__c":"Gait imbalance","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An absolute or relative decrease in retinal sensitivity extending from edge (periphery) of the visual field in a concentric pattern. The visual field is the area that is perceived simultaneously by a fixating eye.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001133","HPO_Synonym__c":"Concentric narrowing of visual field; Constricted visual field; Constricted visual fields; Limited peripheral vision; Reduced peripheral vision; Visual field constriction","HPO_Name__c":"Constriction of peripheral visual field","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:231178","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An inherited retinal disease subtype in which the rod photoreceptors appear to be more severely affected than the cone photoreceptors. Typical presentation is with nyctalopia (due to rod dysfunction) followed by loss of mid-peripheral field of vision, which gradually extends and leaves many patients with a small central island of vision due to the preservation of macular cones.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000510","HPO_Synonym__c":"Retinitis pigmentosa; Rod cone dystrophy","HPO_Name__c":"Rod-cone dystrophy","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Congenital Abnormality"],"Specialist":["Genetics","Ophthalmology","Otolaryngology","Retinal","Pediatrics"],"Account":["Retinal"]},"synonyms":["ush2"," usher syndrome type ii"]}