{"Name":"Periventricular nodular heterotopia","DiseaseID__c":"GARD:0012724","id":12724,"encodedName":"periventricular-nodular-heterotopia","IsDeleted":false,"Disease_Name_Full__c":"Periventricular nodular heterotopia","Xref_IDs__c":"816068000; C1868720; C202072; D054091; DOID:0050454; HP:0032388; MEDGEN:358387; MONDO:0020341; OMIMPS:300049; ORPHA:98892","USA_Estimate__c":null,"No_of_Specialist_Tagsa__c":5,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":0,"World_Estimate__c":null,"No_of_HRSA_records__c":0,"Evidence_Based_Score__c":0,"No_of_Disease_Descriptions__c":4,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0020341","Disease_Description__c":"Periventricular nodular heterotopia (PNH) is a brain malformation, due to abnormal neuronal migration, in which a subset of neurons fails to migrate into the developing cerebral cortex and remains as nodules that line the ventricular surface. Classical PNH is a rare X-linked dominant disorder far more frequent in females who present normal intelligence to borderline intellectual deficit, epilepsy of variable severity and extra-central nervous system signs, especially cardiovascular defects or coagulopathy. The disorder is generally associated with prenatal lethality in males.","GARD_Name__c":"Periventricular nodular heterotopia","GARD_Synonym__c":"periventricular heterotopia; pvnh; pvnh - periventricular nodular heterotopia","Curated_Disease_Description_Source__c":"GARD:0012724","Curated_Disease_Description__c":"Periventricular heterotopia is a condition in which nerve cells (neurons) do not migrate properly during the early development of the fetal brain, from about the 6th week to the 24th week of pregnancy. Heterotopia means \"out of place.\" In normal brain development, neurons form in the periventricular region, located around fluid-filled cavities (ventricles) near the center of the brain. The neurons then migrate outward to form the exterior of the brain (cerebral cortex) in six onion-like layers. In periventricular heterotopia, some neurons fail to migrate to their proper position and form clumps around the ventricles. Periventricular heterotopia usually becomes evident when seizures first appear, often during the teenage years. The nodules around the ventricles are then typically discovered when magnetic resonance imaging (MRI) studies are done. Affected individuals usually have normal intelligence, although some have mild intellectual disability. Difficulty with reading and spelling (dyslexia) and movement problems have been reported in some people with periventricular heterotopia. Less commonly, individuals with periventricular heterotopia may have other features including more severe brain malformations, small head size (microcephaly), developmental delays, recurrent infections, blood vessel abnormalities, stomach problems, or lung disease. Periventricular heterotopia may also occur in association with other conditions such as Ehlers-Danlos syndrome, which results in extremely flexible joints, skin that stretches easily, and fragile blood vessels.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":null,"Age_at_Onset_Snippet_Text__c":"as a Child","SourceID__c":"ORPHA:98892","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Grouping","MONDO_ID__c":"MONDO:0020341","ORPHANET_ID__c":"ORPHA:98892","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Heterotopia nodular periventricular","Spanish_Description_Source__c":"ORPHA:98892","Spanish_Description__c":"Es una malformación cerebral debida a una migración neuronal anómala en la que un subconjunto de neuronas no migra a la corteza cerebral en desarrollo y permanecen como nódulos que recubren la superficie ventricular. La forma clásica es un trastorno poco frecuente, con patrón de herencia dominante ligado al cromosoma X mucho más frecuente en mujeres, que presentan desde inteligencia normal hasta déficit intelectual límite, epilepsia de gravedad variable y signos fuera del SNC, especialmente defectos cardiovasculares o coagulopatía. Por lo general, el trastorno se asocia a letalidad prenatal en varones.","Spanish_Disease_Name__c":"heterotopia nodular periventricular","Spanish_GARD_Synonym__c":null,"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":"Periventricular heterotopia is a condition in which nerve cells (neurons) do not migrate properly during the early development of the fetal brain, from about the 6th week to the 24th week of pregnancy. Heterotopia means \"out of place.\" In normal brain development, neurons form in the periventricular region, located around fluid-filled cavities (ventricles) near the center of the brain. The neurons then migrate outward to form the exterior of the brain (cerebral cortex) in six onion-like layers. In periventricular heterotopia, some neurons fail to migrate to their proper position and form clumps around the ventricles. Periventricular heterotopia usually becomes evident when seizures first appear, often during the teenage years. The nodules around the ventricles are then typically discovered when magnetic resonance imaging (MRI) studies are done. Affected individuals usually have normal intelligence, although some have mild intellectual disability. Difficulty with reading and spelling (dyslexia) and movement problems have been reported in some people with periventricular heterotopia. Less commonly, individuals with periventricular heterotopia may have other features including more severe brain malformations, small head size (microcephaly), developmental delays, recurrent infections, blood vessel abnormalities, stomach problems, or lung disease. Periventricular heterotopia may also occur in association with other conditions such as Ehlers-Danlos syndrome, which results in extremely flexible joints, skin that stretches easily, and fragile blood vessels.","Curated_Disease_Description_Source__c":"GARD:0012724","GARD_Synonym__c":"periventricular heterotopia; pvnh; pvnh - periventricular nodular heterotopia","Name":"Periventricular nodular heterotopia","estimateUsa":""}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Epilepsy Foundation","Website__c":"https://www.epilepsy.com/"},{"Account_Name__c":"Alianza Iberoamericana de Enfermedades Raras o Poco Frecuentes","Website__c":"https://aliber.org/web/"},{"Account_Name__c":"Federación Mexicana de Enfermedades Raras (FEMEXER)","Website__c":"http://www.femexer.org/"},{"Account_Name__c":"Federación Española de Enfermedades Raras","Website__c":"https://enfermedades-raras.org/"},{"Account_Name__c":"Federación Colombiana de Enfermedades Raras","Website__c":"http://www.fecoer.org"},{"Account_Name__c":"Federación Argentina de Enfermedades Poco Frecuentes","Website__c":"https://fadepof.org.ar/"},{"Account_Name__c":"Asociación Todos Unidos Enfermedades Raras Uruguay","Website__c":"https://atueru.org.uy/"},{"Account_Name__c":"Epilepsia en Latinoamérica","Website__c":"https://www.epilepsia.net/"},{"Account_Name__c":"Camelice","Website__c":"https://camelice.org/"},{"Account_Name__c":"Fundación Liga Colombiana Contra la Epilepsia","Website__c":"http://epilepsiavalle.com/"},{"Account_Name__c":"Brain Foundation","Website__c":"http://www.brainfoundation.org.au/"},{"Account_Name__c":"PVNH Support & Awareness","Website__c":"https://pvnhsupport.com/"}],"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":"Neurodevelopmental disabilities","Tag_Category__c":"Specialist","curated_tag_name":"Neurodevelopmental disabilities"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:98892"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C1868720"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0012724","Source__c":"RareSource"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0050454","Source__c":"MONDO:0020341","Xref__c":"DOID:0050454"},{"URL__c":"https://www.omim.org/phenotypicSeries/PS300049","Source__c":"MONDO:0020341","Xref__c":"OMIMPS:300049"},{"URL__c":"https://www.orpha.net/en/disease/detail/98892","Source__c":"C1868720; MONDO:0020341; ORPHA:98892","Xref__c":"ORPHA:98892"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C1868720","Source__c":"C1868720","Xref__c":"C1868720"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=358387","Source__c":"C1868720","Xref__c":"MEDGEN:358387"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C054091","Source__c":"C1868720; MONDO:0020341","Xref__c":"D054091"},{"URL__c":"https://hpo.jax.org/browse/term/HP:0032388","Source__c":"C1868720","Xref__c":"HP:0032388"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0020341","Source__c":"GARD:0012724","Xref__c":"MONDO:0020341"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=816068000","Source__c":"C1868720","Xref__c":"816068000"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C202072","Source__c":"C1868720","Xref__c":"C202072"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"NEDD4L","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MAP1B","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"FLNA","GHR_URL__c":"https://medlineplus.gov/genetics/gene/flna","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"ARFGEF2","GHR_URL__c":"https://medlineplus.gov/genetics/gene/arfgef2","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"TMTC3","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"ARF1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"ERMARD","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive","X-linked dominant","Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Any structural abnormality of a cardiac valve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001654","HPO_Synonym__c":"Abnormality of the heart valves; Valvular abnormality","HPO_Name__c":"Abnormal heart valve morphology","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A focal-onset seizure is a type of seizure originating within networks limited to one hemisphere. They may be discretely localized or more widely distributed, and may originate in subcortical structures.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007359","HPO_Synonym__c":"Focal onset seizure; Focal seizure; Focal seizures; Focal-onset seizures; Partial seizure; Partial seizures; Seizure affecting one half of brain","HPO_Name__c":"Focal-onset seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Very frequent (80-99%)","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":"ORPHA:98892","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal susceptibility to bleeding, often referred to as a bleeding diathesis. A bleeding diathesis may be related to vascular, platelet and coagulation defects.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001892","HPO_Synonym__c":"Bleeding diathesis; Bleeding tendency; Hemorrhagic diathesis","HPO_Name__c":"Abnormal bleeding","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"In utero, the ductus arteriosus (DA) serves to divert ventricular output away from the lungs and toward the placenta by connecting the main pulmonary artery to the descending aorta. A patent ductus arteriosus (PDA) in the first 3 days of life is a physiologic shunt in healthy term and preterm newborn infants, and normally is substantially closed within about 24 hours after bith and completely closed after about three weeks. Failure of physiologcal closure is referred to a persistent or patent ductus arteriosus (PDA). Depending on the degree of left-to-right shunting, PDA can have clinical consequences.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001643","HPO_Synonym__c":"Ductus arteriosus; Patent ductus Botalli; PDA; Persistent arterial duct; Persistent ductus arteriosus","HPO_Name__c":"Patent ductus arteriosus","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduction in thickness of the skin, generally associated with a loss of suppleness and elasticity of the skin.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000963","HPO_Synonym__c":"Thin skin","HPO_Name__c":"Thin skin","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A displacement or misalignment of the humerus with respect to the other bones of the should joint. Note that a subluxation is a partial dislocation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003834","HPO_Synonym__c":"Shoulder dislocation","HPO_Name__c":"Shoulder dislocation","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A structural anomaly of the nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012639","HPO_Synonym__c":"Abnormal shape of nervous system; Abnormality of nervous system morphology","HPO_Name__c":"Abnormal nervous system morphology","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A form of gray matter heterotopia were the mislocalized gray matter is typically located periventricularly, also sometimes called subependymal heterotopia. Periventricular means beside the ventricles. This is by far the most common location for heterotopia. Subependymal heterotopia present in a wide array of variations. There can be a small single node or a large number of nodes, can exist on either or both sides of the brain at any point along the higher ventricle margins, can be small or large, single or multiple, and can form a small node or a large wavy or curved mass.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007165","HPO_Synonym__c":"Periventricular gray matter heterotopia; Periventricular neuronal heterotopia; Subependymal gray matter heterotopia; Subependymal neuronal heterotopia","HPO_Name__c":"Periventricular heterotopia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Very frequent (80-99%)","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":"ORPHA:98892","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Aortic dilatation refers to a dimension that is greater than the 95th percentile for the normal person age, sex and body size. In contrast, an aneurysm is defined as a localized dilation of the aorta that is more than 150 percent of predicted (ratio of observed to expected diameter 1.5 or more). Aneurysm should be distinguished from ectasia, which represents a diffuse dilation of the aorta less than 50 percent of normal aorta diameter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004942","HPO_Synonym__c":"Aortic dilatation; Bulge in wall of large artery that carries blood away from heart; Enlarged aorta","HPO_Name__c":"Aortic aneurysm","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An insufficiency of the aortic valve, leading to regurgitation (backward flow) of blood from the aorta into the left ventricle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001659","HPO_Synonym__c":"Aortic insufficiency; Aortic valve regurgitation","HPO_Name__c":"Aortic regurgitation","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Pyloric stenosis, also known as infantile hypertrophic pyloric stenosis, is an uncommon condition in infants characterized by abnormal thickening of the pylorus muscles in the stomach leading to gastric outlet obstruction. Clinically infants are well at birth. Then, at 3 to 6 weeks of age, the infants present with projectile vomiting, potentially leading to dehydration and weight loss.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002021","HPO_Synonym__c":"Infantile hypertrophic pyloric stenosis; Pylorus stenosis","HPO_Name__c":"Pyloric stenosis","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The capability that a joint (or a group of joints) has to move, passively and/or actively, beyond normal limits along physiological axes.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001382","HPO_Synonym__c":"Double-Jointed; Extensible joints; Flexible joints; Hyperextensible joints; Increased joint mobility; Increased mobility of joints; Joint hyperextensibility; Joint hyperflexibility; Joint hyperlaxity; Joint laxity; Joints move beyond expected range of motion; Lax joints; Loose-jointedness","HPO_Name__c":"Joint hypermobility","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The kneecap normally is located within the groove termed trochlea on the distal femur and can slide up and down in it. Patellar dislocation occurs if the patella fully dislocates out of the groove.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002999","HPO_Synonym__c":"Dislocated kneecap; Dislocated patellae; Dislocation of patella","HPO_Name__c":"Patellar dislocation","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:98892","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100790","HPO_Name__c":"Hernia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology","Congenital Abnormality"],"Specialist":["Genetics","Neurology","Epilepsy","Neurodevelopmental disabilities","Pediatrics"],"Account":["Epilepsy"]},"synonyms":["periventricular heterotopia"," pvnh"," pvnh - periventricular nodular heterotopia"]}