{"Name":"Pontocerebellar hypoplasia type 8","DiseaseID__c":"GARD:0017488","id":17488,"encodedName":"pontocerebellar-hypoplasia-type-8","IsDeleted":false,"Disease_Name_Full__c":"Pontocerebellar hypoplasia type 8","Xref_IDs__c":"718611007; C3554209; DOID:0060277; MEDGEN:767123; MONDO:0013990; OMIM:614961; ORPHA:324569","USA_Estimate__c":"1,000","No_of_Specialist_Tagsa__c":4,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":0,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":0,"No_of_Disease_Descriptions__c":4,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0013990","Disease_Description__c":"Pontocerebellar hypoplasia type 8 (PCH8) is a novel very rare form of pontocerebellar hypoplasia (see this term) characterized clinically by progressive microencephaly, feeding difficulties, severe developmental delay, although walking may be achieved, hypotonia often associated with increased muscle tone of lower extremities and deep tendon reflexes, joint deformities in the lower extremities, and occasionally complex seizures. PCH8 is caused by a loss-of-function mutation in the <i>CHMP1A</i> gene. MRI demonstrates a pontocerebellar hypoplasia with vermis and hemispheres equally affected and mild to severely reduced cerebral white matter volume with a fully formed very thin corpus callosum.","GARD_Name__c":"Pontocerebellar hypoplasia type 8","GARD_Synonym__c":"chmp1a non-syndromic pontocerebellar hypoplasia; congenital pontocerebellar hypoplasia type 8; non-syndromic pontocerebellar hypoplasia caused by mutation in chmp1a; pch8; pch8 - pontocerebellar hypoplasia type 8; pontocerebellar hypoplasia due to chmp1a (charged multivesicular body protein 1a) mutation; pontocerebellar hypoplasia due to chmp1a mutation","Curated_Disease_Description_Source__c":"ORPHA:324569","Curated_Disease_Description__c":"Pontocerebellar hypoplasia type 8 (PCH8) is a very rare form of pontocerebellar hypoplasia characterized clinically by progressive microencephaly, feeding difficulties, severe developmental delay, although walking may be achieved, hypotonia often associated with increased muscle tone of lower extremities and deep tendon reflexes, joint deformities in the lower extremities, and occasionally complex seizures. PCH8 is caused by a loss-of-function mutation in the <i>CHMP1A</i> gene. MRI demonstrates a pontocerebellar hypoplasia with vermis and hemispheres equally affected and mild to severely reduced cerebral white matter volume with a fully formed very thin corpus callosum.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Newborn and as an Infant","SourceID__c":"ORPHA:324569","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0013990","ORPHANET_ID__c":"ORPHA:324569","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Hipoplasia pontocerebelosa tipo 8","Spanish_Description_Source__c":"ORPHA:324569","Spanish_Description__c":"La hipoplasia pontocerebelosa tipo 8 (PCH8) es una forma muy poco frecuente de hipoplasia pontocerebelosa caracterizada clínicamente por microencefalia progresiva, dificultades para alimentarse, retraso grave del desarrollo y, aunque se pueda lograr la deambulación, hipotonía a menudo asociada con aumento del tono muscular de las extremidades inferiores y reflejos tendinosos profundos, deformidades articulares de las extremidades inferiores y, en ocasiones, convulsiones complejas. La PCH8 está causada por una mutación de pérdida de función en el gen <i>CHMP1A</i>. La RM evidencia una hipoplasia pontocerebelosa con vermis y hemisferios igualmente afectados y una disminución del volumen de materia blanca cerebral de leve a grave con notable adelgazamiento de un cuerpo calloso completamente formado.","Spanish_Disease_Name__c":"hipoplasia pontocerebelosa tipo 8","Spanish_GARD_Synonym__c":"hipoplasia pontocerebelosa por una mutación en el gen chmp1a; hpc8","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":"Pontocerebellar hypoplasia type 8 (PCH8) is a very rare form of pontocerebellar hypoplasia characterized clinically by progressive microencephaly, feeding difficulties, severe developmental delay, although walking may be achieved, hypotonia often associated with increased muscle tone of lower extremities and deep tendon reflexes, joint deformities in the lower extremities, and occasionally complex seizures. PCH8 is caused by a loss-of-function mutation in the <i>CHMP1A</i> gene. MRI demonstrates a pontocerebellar hypoplasia with vermis and hemispheres equally affected and mild to severely reduced cerebral white matter volume with a fully formed very thin corpus callosum.","Curated_Disease_Description_Source__c":"ORPHA:324569","GARD_Synonym__c":"chmp1a non-syndromic pontocerebellar hypoplasia; congenital pontocerebellar hypoplasia type 8; non-syndromic pontocerebellar hypoplasia caused by mutation in chmp1a; pch8; pch8 - pontocerebellar hypoplasia type 8; pontocerebellar hypoplasia due to chmp1a (charged multivesicular body protein 1a) mutation; pontocerebellar hypoplasia due to chmp1a mutation","Name":"Pontocerebellar hypoplasia type 8","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"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":"Neurology","Tag_Category__c":"Disease Category;Specialist","category_description":"Neurological diseases affect the brain, spinal cord, cranial nerves, autonomic nerves, or other peripheral nerves.","curated_tag_name":"Neurological diseases"},{"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":"Epilepsy","Tag_Category__c":"Account;Specialist","curated_tag_name":"Epilepsy"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:324569"},{"Age_At_Onset__c":"Neonatal","Provided_By__c":"ORPHA:324569"}],"External_Identifier_Disease__c":[{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=718611007","Source__c":"C3554209; MONDO:0013990","Xref__c":"718611007"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0060277","Source__c":"MONDO:0013990","Xref__c":"DOID:0060277"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=767123","Source__c":"C3554209","Xref__c":"MEDGEN:767123"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C3554209","Source__c":"C3554209","Xref__c":"C3554209"},{"URL__c":"https://www.orpha.net/en/disease/detail/324569","Source__c":"C3554209; MONDO:0013990; ORPHA:324569","Xref__c":"ORPHA:324569"},{"URL__c":"https://www.omim.org/entry/614961","Source__c":"C3554209; MONDO:0013990; ORPHA:324569","Xref__c":"OMIM:614961"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0013990","Source__c":"GARD:0017488","Xref__c":"MONDO:0013990"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"CHMP1A","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormally low volume of the white matter of the brain.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0034295","HPO_Name__c":"Reduced cerebral white matter volume","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduced ability to participate in the back-and-forth flow of social interaction appropriate to culture and developmental level, which is normally characterized by an influence of the behavior of one person on the behavior of another person. This results in difficulty interacting with others through emotional, physical, or verbal communication.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012760","HPO_Synonym__c":"Impaired social interaction; Impaired social interactions; Impaired social reciprocity; Poor social interactions","HPO_Name__c":"Reduced social responsiveness","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the brainstem.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002365","HPO_Synonym__c":"Brainstem hypoplasia; Hypoplastic brain stem; Hypoplastic brainstem; Small brainstem; Underdeveloped brainstem","HPO_Name__c":"Hypoplasia of the brainstem","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Chorea (Greek for 'dance') refers to widespread arrhythmic involuntary movements of a forcible, jerky and restless fashion. It is a random-appearing sequence of one or more discrete involuntary movements or movement fragments. Movements appear random because of variability in timing, duration or location. Each movement may have a distinct start and end. However, movements may be strung together and thus may appear to flow randomly from one muscle group to another. Chorea can involve the trunk, neck, face, tongue, and extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002072","HPO_Synonym__c":"Choreic movements; Choreiform movements","HPO_Name__c":"Chorea","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","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":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Mid upper eyelash length >10 mm or increased length of the eyelashes (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000527","HPO_Synonym__c":"Ciliary trichomegaly; Eyelash trichomegaly; Increased length of eyelashes; Long eyelashes; Unusually long eyelashes","HPO_Name__c":"Long eyelashes","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality of refraction characterized by the ability to see objects in the distance clearly, while objects nearby appear blurry.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000540","HPO_Synonym__c":"Farsightedness; Hyperopia; Long-sightedness","HPO_Name__c":"Hypermetropia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Outward turning of the heel, resulting in clubfoot with the person walking on the inner part of the foot.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004684","HPO_Name__c":"Talipes valgus","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","Feature__r":{"HPO_Description__c":"Complete lack of development of speech and language abilities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001344","HPO_Synonym__c":"Absent speech development; Lack of language development; Lack of speech; No speech development; No speech or language development; Nonverbal","HPO_Name__c":"Absent speech","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002465","HPO_Synonym__c":"Poor speech","HPO_Name__c":"Poor speech","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Hyperreflexia is the presence of hyperactive stretch reflexes of the muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001347","HPO_Synonym__c":"Increased deep tendon reflexes; Increased reflexes","HPO_Name__c":"Hyperreflexia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","Feature__r":{"HPO_Description__c":"The term intellectual disability or intellectual developmental disorder is used to describe significantly sub-average intellectual and adaptive functioning based on clinical assessment and as measured by individually administered, appropriately normed, standardized and validated tests of intellectual functioning and adaptive behavior, with onset during the developmental period from infancy through adolescence.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001249","HPO_Synonym__c":"Intellectual disability; Mental deficiency; Mental retardation; Mental retardation, nonspecific; Mental-retardation; Nonprogressive intellectual disability; Nonprogressive mental retardation","HPO_Name__c":"Intellectual disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Involuntary contractions of muscle leading to involuntary movements of extremities, neck, trunk, or face.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004305","HPO_Synonym__c":"Involuntary movements; Involuntary muscle contractions","HPO_Name__c":"Involuntary movements","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A manifest or latent ocular deviation in which one or both eyes tends to deviate nasally.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0020045","HPO_Synonym__c":"Convergent squint; Convergent strabismus","HPO_Name__c":"Esodeviation","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001263","HPO_Synonym__c":"Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; GDD; Lack of psychomotor development; Motor and developmental delay; Motormental retardation; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development","HPO_Name__c":"Global developmental delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Upper insertion of the ear to the scalp below an imaginary horizontal line drawn between the inner canthi of the eye and extending posteriorly to the ear.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000369","HPO_Synonym__c":"Low set ears; Low-set ears; Low-set pinnae; Lowset ears; Melotia","HPO_Name__c":"Low-set ears","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Muscular hypotonia (abnormally low muscle tone) affecting the musculature of the trunk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008936","HPO_Synonym__c":"Low muscle tone in trunk; Muscular hypotonia of the trunk; Truncal hypotonia","HPO_Name__c":"Axial hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the corpus callosum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002079","HPO_Synonym__c":"Corpus callosum hypoplasia; Hypoplasia of corpus callosum; Hypoplastic corpus callosum; Underdevelopment of part of brain called corpus callosum","HPO_Name__c":"Hypoplasia of the corpus callosum","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A hole between the two bottom chambers (ventricles) of the heart. The defect is centered around the most superior aspect of the ventricular septum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001629","HPO_Synonym__c":"Hole in heart wall separating two lower heart chambers; Ventricular septal defects; Ventriculoseptal defect; VSD","HPO_Name__c":"Ventricular septal defect","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Infrequent or difficult evacuation of feces.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002019","HPO_Synonym__c":"Constipation; Costiveness; Dyschezia","HPO_Name__c":"Constipation","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The presence of an abnormal lateral curvature of the spine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002650","HPO_Name__c":"Scoliosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Failure of the foramen ovale to seal postnatally, leaving a potential conduit between the left and right cardiac atria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001655","HPO_Synonym__c":"Persistent foramen ovale; PFO","HPO_Name__c":"Patent foramen ovale","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Anteriorly-facing nostrils viewed with the head in the Frankfurt horizontal and the eyes of the observer level with the eyes of the subject. This gives the appearance of an upturned nose (upturned nasal tip).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000463","HPO_Synonym__c":"Anteverted nose; Anteverted nostrils; Nasal tip, upturned; Nostrils anteverted; Upturned nares; Upturned nasal tip; Upturned nose; Upturned nostrils","HPO_Name__c":"Anteverted nares","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition in which the stomach contents leak backwards from the stomach into the esophagus through the lower esophageal sphincter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002020","HPO_Synonym__c":"Acid reflux; Acid reflux disease; Gastro-esophageal reflux; Gastroesophageal reflux disease; GERD; GORD; Heartburn","HPO_Name__c":"Gastroesophageal reflux","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Triangular appearance of the oral aperture with the apex in the midpoint of the upper vermilion and the lower vermilion forming the base.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0010804","HPO_Synonym__c":"Inverted V-shaped upper lip","HPO_Name__c":"Tented upper lip vermilion","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A form of strabismus with one or both eyes turned inward ('crossed') to a relatively severe degree, usually defined as 10 diopters or more.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000565","HPO_Synonym__c":"Inward turning cross eyed","HPO_Name__c":"Esotropia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","Feature__r":{"HPO_Description__c":"An increase in height of the medial longitudinal arch of the foot that does not flatten on weight bearing (i.e., a distinctly hollow form of the sole of the foot when it is bearing weight).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001761","HPO_Synonym__c":"Cavus foot; High-arched foot","HPO_Name__c":"Pes cavus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Tendon reflexes that are noticeably more active than usual (conventionally denoted 3+ on clinical examination). Brisk reflexes may or may not indicate a neurological lesion. They are distinguished from hyperreflexia by the fact that hyerreflexia is characterized by hyperactive repeating (clonic) reflexes, which are considered to be always abnormal.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001348","HPO_Synonym__c":"Brisk deep tendon reflexes","HPO_Name__c":"Brisk reflexes","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A type of abnormal location of the ears in which the position of the ears is characterized by posterior rotation (the superior part of the ears is rotated towards the back of the head, and the inferior part of the ears towards the front).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000358","HPO_Synonym__c":"Ear, posterior angulation, increased; Ears rotated toward back of head; Posteriorly angulated ears; Posteriorly rotated; Posteriorly rotated auricles; Posteriorly-angulated ears; Posteriorly-rotated ears","HPO_Name__c":"Posteriorly rotated ears","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition in which there is increased muscle tone so that arms or legs, for example, are stiff and difficult to move.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001276","HPO_Synonym__c":"Hypertonicity; Increased muscle tone","HPO_Name__c":"Hypertonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Loss of developmental skills, as manifested by loss of developmental milestones.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002376","HPO_Synonym__c":"Loss of acquired milestones; Loss of developmental milestones; Loss of milestones; Mental deterioration in childhood; Neurodevelopmental regression; Psychomotor regression; Psychomotor regression beginning in infancy; Psychomotor regression in infants; Psychomotor regression, progressive","HPO_Name__c":"Developmental regression","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of refraction error associated with abnormal curvatures on the anterior and/or posterior surface of the cornea.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000483","HPO_Synonym__c":"Abnormal curving of the cornea or lens of the eye; Astigmatism","HPO_Name__c":"Astigmatism","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Increased density/number and/or increased diameter of eyebrow hairs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000574","HPO_Synonym__c":"Bushy eyebrows; Dense eyebrow; Heavy eyebrows; Hypertrichosis of the eyebrow; Prominent eyebrows; Thick eyebrow; Thick eyebrows","HPO_Name__c":"Thick eyebrow","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011968","HPO_Synonym__c":"Decreased oral intake; Feeding difficulties; Feeding problems; Poor feeding","HPO_Name__c":"Feeding difficulties","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A motor disorder characterized by a velocity-dependent increase in tonic stretch reflexes with increased muscle tone, exaggerated (hyperexcitable) tendon reflexes.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001257","HPO_Synonym__c":"Involuntary muscle stiffness, contraction, or spasm; Muscle spasticity; Muscular spasticity","HPO_Name__c":"Spasticity","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","Feature__r":{"HPO_Description__c":"Difficulty in swallowing.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002015","HPO_Synonym__c":"Difficulty swallowing; Poor swallowing; Swallowing difficulties; Swallowing difficulty","HPO_Name__c":"Dysphagia","Feature_System__c":"Nervous System; Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hypertrichosis is increased hair growth that is abnormal in quantity or location.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000998","HPO_Name__c":"Hypertrichosis","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Cerebellar hypoplasia is a descriptive term implying a cerebellum with a reduced volume, but a normal shape and is stable over time.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001321","HPO_Synonym__c":"Congenital cerebellar hypoplasia; Hypoplasia of cerebellum; Hypoplastic cerebellum; Small cerebellum; Underdeveloped cerebellum","HPO_Name__c":"Cerebellar hypoplasia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A failure to achieve the ability to walk at an appropriate developmental stage. Most children learn to walk in a series of stages, and learn to walk short distances independently between 12 and 15 months.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0031936","HPO_Synonym__c":"Delayed walking","HPO_Name__c":"Delayed ability to walk","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Meeting of the medial eyebrows in the midline.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000664","HPO_Synonym__c":"Monobrow; Synophris; Unibrow","HPO_Name__c":"Synophrys","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A type of ataxia characterized by the impairment of the ability to coordinate the movements required for normal walking. Gait ataxia is characteirzed by a wide-based staggering gait with a tendency to fall.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002066","HPO_Synonym__c":"Ataxia of gait; Ataxic gait; Inability to coordinate movements when walking","HPO_Name__c":"Gait ataxia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Multiple congenital contractures in different body areas.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002804","HPO_Synonym__c":"Arthrogryposis; Arthrogryposis multiplex; Arthrogryposis, congenital; Multiple congenital contractures","HPO_Name__c":"Arthrogryposis multiplex congenita","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Generalized muscular hypotonia (abnormally low muscle tone).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001290","HPO_Synonym__c":"Generalized decreased muscle tone; Generalized muscular hypotonia; Hypotonia, generalized","HPO_Name__c":"Generalized hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Joint stiffness is a perceived sensation of tightness in a joint or joints when attempting to move them after a period of inactivity. Joint stiffness typically subsides over time.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001387","HPO_Synonym__c":"Joint stiffness; Stiff joint; Stiff joints","HPO_Name__c":"Joint stiffness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Talipes equinovarus (also called clubfoot) typically has four main components: inversion and adduction of the forefoot; inversion of the heel and hindfoot; equinus (limitation of extension) of the ankle and subtalar joint; and internal rotation of the leg.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001762","HPO_Synonym__c":"Club feet; Club foot; Clubbing of feet; Clubfeet; Clubfoot; Equinovarus; Foot, talipes equinovarus; Pes equinovarus; Pes equinus","HPO_Name__c":"Talipes equinovarus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001252","HPO_Synonym__c":"Low muscle tone; Low or weak muscle tone; Muscle hypotonia; Muscular hypotonia","HPO_Name__c":"Hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A form of loss of vision caused by damage to the visual cortex rather than a defect in the eye.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100704","HPO_Synonym__c":"Cortical blindness; Cortical visual impairment; Cortical/cerebral visual impairment; CVI","HPO_Name__c":"Cerebral visual impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:614961","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Head circumference which falls below 2 standard deviations below the mean for age and sex because of insufficient head growth after birth.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005484","HPO_Synonym__c":"Acquired microcephaly; Deceleration of head growth; Microcephaly, acquired; Microcephaly, postnatal; Postnatal deceleration of head circumference; Postnatal microcephaly","HPO_Name__c":"Secondary microcephaly","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology","Congenital Abnormality"],"Specialist":["Genetics","Neurology","Epilepsy","Pediatrics"],"Account":["Epilepsy"]},"synonyms":["chmp1a non-syndromic pontocerebellar hypoplasia"," congenital pontocerebellar hypoplasia type 8"," non-syndromic pontocerebellar hypoplasia caused by mutation in chmp1a"," pch8"," pch8 - pontocerebellar hypoplasia type 8"," pontocerebellar hypoplasia due to chmp1a (charged multivesicular body protein 1a) mutation"," pontocerebellar hypoplasia due to chmp1a mutation"]}