{"Name":"Pontocerebellar hypoplasia type 6","DiseaseID__c":"GARD:0010710","id":10710,"encodedName":"pontocerebellar-hypoplasia-type-6","IsDeleted":false,"Disease_Name_Full__c":"Pontocerebellar hypoplasia type 6","Xref_IDs__c":"718606005; C1969084; C548074; DOID:0060275; MEDGEN:370596; MONDO:0012683; OMIM:611523; ORPHA:166073","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":3,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0012683","Disease_Description__c":"A rare, genetic form of pontocerebellar hypoplasia (PCH) characterized by neocortical and severe cerebral cortical atrophy associated with pontocerebellar hypoplasia with the pons and cerebellum equally affected. Clinically the disorder manifests at birth with hypotonia, clonus, epilepsy, impaired swallowing and from infancy by progressive microcephaly, spasticity and lactic acidosis.","GARD_Name__c":"Pontocerebellar hypoplasia type 6","GARD_Synonym__c":"congenital pontocerebellar hypoplasia type 6; fatal infantile encephalopathy with mitochondrial respiratory chain defect; fatal infantile encephalopathy with mitochondrial respiratory chain defects; non-syndromic pontocerebellar hypoplasia caused by mutation in rars2; pch6; pch6 - pontocerebellar hypoplasia type 6; rars2 non-syndromic pontocerebellar hypoplasia","Curated_Disease_Description_Source__c":"MONDO:0012683","Curated_Disease_Description__c":"A rare, genetic form of pontocerebellar hypoplasia (PCH) characterized by neocortical and severe cerebral cortical atrophy associated with pontocerebellar hypoplasia with the pons and cerebellum equally affected. Clinically the disorder manifests at birth with hypotonia, clonus, epilepsy, impaired swallowing and from infancy by progressive microcephaly, spasticity and lactic acidosis.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Newborn","SourceID__c":"ORPHA:166073","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0012683","ORPHANET_ID__c":"ORPHA:166073","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Hipoplasia pontocerebelosa tipo 6","Spanish_Description_Source__c":"ORPHA:166073","Spanish_Description__c":"Es una forma poco frecuente de hipoplasia pontocerebelosa (HPC) de origen genético caracterizada por atrofia cerebral cortical y neocortical grave asociada a hipoplasia pontocerebelosa con afectación del tronco cerebral y del cerebelo por igual. Clínicamente, el trastorno se manifiesta al nacimiento con hipotonía, clonus, epilepsia y trastornos de la deglución, y desde la lactancia con microcefalia progresiva, espasticidad y acidosis láctica.","Spanish_Disease_Name__c":"hipoplasia pontocerebelosa tipo 6","Spanish_GARD_Synonym__c":"encefalopatía letal del lactante con defectos en la cadena respiratoria mitocondrial; hpc6","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":"A rare, genetic form of pontocerebellar hypoplasia (PCH) characterized by neocortical and severe cerebral cortical atrophy associated with pontocerebellar hypoplasia with the pons and cerebellum equally affected. Clinically the disorder manifests at birth with hypotonia, clonus, epilepsy, impaired swallowing and from infancy by progressive microcephaly, spasticity and lactic acidosis.","Curated_Disease_Description_Source__c":"MONDO:0012683","GARD_Synonym__c":"congenital pontocerebellar hypoplasia type 6; fatal infantile encephalopathy with mitochondrial respiratory chain defect; fatal infantile encephalopathy with mitochondrial respiratory chain defects; non-syndromic pontocerebellar hypoplasia caused by mutation in rars2; pch6; pch6 - pontocerebellar hypoplasia type 6; rars2 non-syndromic pontocerebellar hypoplasia","Name":"Pontocerebellar hypoplasia type 6","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"CureARS","Website__c":"https://www.curears.org/"},{"Account_Name__c":"United Mitochondrial Disease Foundation","Website__c":"https://www.umdf.org"},{"Account_Name__c":"Fetal Health Foundation","Website__c":"https://www.fetalhealthfoundation.org/"},{"Account_Name__c":"MitoAction","Website__c":"https://www.mitoaction.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":"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":"Inborn Errors of Metabolism","Tag_Category__c":"Cause;Disease Category","category_description":"Inherited metabolic diseases, or inborn errors of metabolism, are a group of genetic diseases that affect the ability of the body's cells to convert food into energy.","curated_tag_name":"Inherited metabolic 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":"Mitochondrial","Tag_Category__c":"Account;Cause;Disease Category","category_description":"Mitochondrial diseases are a group of genetic diseases that affect the ability of the body's cells to make energy.","curated_tag_name":"Mitochondrial diseases"},{"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":"Neonatal","Provided_By__c":"ORPHA:166073"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C1969084"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0010710","Source__c":"RareSource"},{"URL__c":"https://www.omim.org/entry/611523","Source__c":"C1969084; MONDO:0012683; ORPHA:166073","Xref__c":"OMIM:611523"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C1969084","Source__c":"C1969084","Xref__c":"C1969084"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0060275","Source__c":"MONDO:0012683","Xref__c":"DOID:0060275"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=370596","Source__c":"C1969084","Xref__c":"MEDGEN:370596"},{"URL__c":"https://www.orpha.net/en/disease/detail/166073","Source__c":"C1969084; MONDO:0012683; ORPHA:166073","Xref__c":"ORPHA:166073"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=718606005","Source__c":"C1969084; MONDO:0012683","Xref__c":"718606005"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C548074","Source__c":"MONDO:0012683","Xref__c":"C548074"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0012683","Source__c":"GARD:0010710","Xref__c":"MONDO:0012683"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"RARS2","GHR_URL__c":"https://medlineplus.gov/genetics/gene/rars2","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex I, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011923","HPO_Name__c":"Decreased activity of mitochondrial complex I","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Progressive microcephaly is diagnosed when the head circumference falls progressively behind age- and sex-dependent norms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000253","HPO_Synonym__c":"Microcephaly, postnatal, progressive; Microcephaly, progressive; Progressively abnormally small cranium; Progressively abnormally small skull","HPO_Name__c":"Progressive microcephaly","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex III, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011924","HPO_Name__c":"Decreased activity of mitochondrial complex III","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An inadequate sucking reflex, resulting in the difficult of newborns to be breast-fed.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002033","HPO_Synonym__c":"Poor suck; Poor sucking; Sucking weakness","HPO_Name__c":"Poor suck","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","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:611523","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006986","HPO_Synonym__c":"Spastic upper extremities; Spastic upper extremity; Spastic upper limb; Spastic upper limbs; Spasticity in upper extremities; Spasticity in upper extremity; Spasticity in upper limb; Spasticity in upper limbs; Spasticity of upper extremities; Spasticity of upper extremity; Spasticity of upper limb; Spasticity of upper limbs; Uncontrollable movement in upper arms; Upper extremities spasticity; Upper extremity spasticity","HPO_Name__c":"Upper limb spasticity","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A generalized-onset seizure is a type of seizure originating at some point within, and rapidly engaging, bilaterally distributed networks. The networks may include cortical and subcortical structures but not necessarily the entire cortex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002197","HPO_Synonym__c":"Generalized onset seizure; Generalized seizures; Generalized-onset seizures; Primary generalized seizure","HPO_Name__c":"Generalized-onset seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A limitation in the passive range of motion of the elbow resulting from loss of elasticity in the periarticular tissues owing to structural changes of non-bony tissues, such as muscles, tendons, ligaments, joint capsules or skin.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0034391","HPO_Name__c":"Elbow contracture","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001272","HPO_Synonym__c":"Atrophic cerebellum; Degeneration of cerebellum","HPO_Name__c":"Cerebellar atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Width of the palate more than 2 SD below the mean (objective) or apparently decreased palatal width (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000189","HPO_Synonym__c":"Decreased palatal width; Decreased transverse dimension of palate; Narrow palate; Narrow roof of mouth","HPO_Name__c":"Narrow palate","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Atrophy of the cortex of the cerebrum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002120","HPO_Synonym__c":"Cerebral cortex atrophy; Cortical atrophy; Decrease in size of the outer layer of the brain due to loss of brain cells","HPO_Name__c":"Cerebral cortical atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Head circumference below 2 standard deviations below the mean for age and sex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000252","HPO_Synonym__c":"Abnormally small cranium; Abnormally small skull; Decreased circumference of cranium; Decreased size of cranium; Decreased size of skull; Reduced head circumference; small cranium; Small head circumference","HPO_Name__c":"Microcephaly","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Very frequent (80-99%)","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:611523","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007366","HPO_Synonym__c":"Brainstem atrophy","HPO_Name__c":"Atrophy/Degeneration affecting the brainstem","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","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:611523","Feature__r":{"HPO_Description__c":"A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001250","HPO_Synonym__c":"Epileptic seizure; Seizures","HPO_Name__c":"Seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased concentration of lactate in the cerebrospinal fluid.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002490","HPO_Synonym__c":"Hyperlactatorachia; Increased cerebrospinal fluid lactate; Increased CSF lactic acid","HPO_Name__c":"Increased CSF lactate","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A state of fatigue, either physical or mental slowness and sluggishness, with difficulties in initiating or performing simple tasks. Distinguished from apathy which implies indifference and a lack of desire or interest in the task. A person with lethargy may have the desire, but not the energy to engage in personal or socially relevant tasks.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001254","HPO_Synonym__c":"Dullness; Inaction; Inactivity; Languor; Lethargy; Slowness; Torpor","HPO_Name__c":"Lethargy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of spasticity that affects one or more limbs (arms or legs).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0034353","HPO_Synonym__c":"Extremity spasticity; Limb spasticity; Spastic extremities; Spastic limb; Spastic limbs; Spasticity of extremities; Spasticity of extremity; Spasticity of limbs","HPO_Name__c":"Appendicular spasticity","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Lack of breathing with no movement of the respiratory muscles and no exchange of air in the lungs. This term refers to a disposition to have recurrent episodes of apnea rather than to a single event.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002104","HPO_Synonym__c":"Absence of spontaneous respiration; Apneic episodes; Apnoea","HPO_Name__c":"Apnea","Feature_System__c":"Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the vermis of cerebellum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001320","HPO_Synonym__c":"Cerebellar vermal hypoplasia; Hypoplasia of the cerebellar vermis; Hypoplastic cerebellar vermis","HPO_Name__c":"Cerebellar vermis hypoplasia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Anterior positioning of the nasal root in comparison to the usual positioning for age.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000426","HPO_Synonym__c":"Elevated nasal bridge; High nasal bridge; Prominent bridge of nose; Prominent nasal bridge; Prominent nasal root; Protruding bridge of nose; Protruding nasal bridge","HPO_Name__c":"Prominent nasal bridge","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","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:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex IV, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008347","HPO_Name__c":"Decreased activity of mitochondrial complex IV","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:611523","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:611523","HPO_Frequency__c":"Frequent (30-79%)","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:611523","HPO_Frequency__c":"Frequent (30-79%)","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:611523","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A profound delay in the achievement of motor or mental milestones in the domains of development of a child.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012736","HPO_Synonym__c":"Global developmental delay, profound","HPO_Name__c":"Profound global developmental delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"An eye that is more deeply recessed into the plane of the face than is typical.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000490","HPO_Synonym__c":"Deep set eye; Deep-set eyes; Deeply set eye; Enophthalmos; Ocular depression; Sunken eye; Sunken eyes","HPO_Name__c":"Deeply set eye","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Failure to thrive (FTT) refers to a child whose physical growth is substantially below the norm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001508","HPO_Synonym__c":"Faltering weight; FTT; Postnatal failure to thrive; Weight faltering","HPO_Name__c":"Failure to thrive","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Atrophy (wasting, decrease in size of cells or tissue) affecting the cerebrum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002059","HPO_Synonym__c":"Degeneration of cerebrum","HPO_Name__c":"Cerebral atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Width of the forehead or distance between the frontotemporales is more than two standard deviations below the mean (objective); or apparently narrow intertemporal region (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000341","HPO_Synonym__c":"Bitemporal narrowing; Bitemporal narrowness; Bitemporal skull narrowing; Decreased width of the forehead; Intertemporal narrowing; Narrow bitemporal diameter; Narrow bitemporal width; Narrow forehead; Temporal narrowness","HPO_Name__c":"Narrow forehead","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Very frequent (80-99%)","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:611523","Feature__r":{"HPO_Description__c":"Spasticity (velocity-dependent increase in tonic stretch reflexes with increased muscle tone and hyperexcitable tendon reflexes) in the muscles of the lower limbs, hips, and pelvis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002061","HPO_Synonym__c":"Lower extremities spasticity; Lower extremity spasticity; Spastic lower extremities; Spastic lower extremity; Spastic lower limb; Spastic lower limbs; Spasticity in lower extremities; Spasticity in lower extremity; Spasticity in lower limb; Spasticity in lower limbs; Spasticity of lower extremities; Spasticity of lower extremity; Spasticity of lower limb; Spasticity of lower limbs","HPO_Name__c":"Lower limb spasticity","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Abnormally increased level of blood lactate (2-hydroxypropanoic acid). Lactate is produced from pyruvate by lactate dehydrogenase during normal metabolism. The terms lactate and lactic acid are often used interchangeably but lactate (the component measured in blood) is strictly a weak base whereas lactic acid is the corresponding acid. Lactic acidosis is often used clinically to describe elevated lactate but should be reserved for cases where there is a corresponding acidosis (pH below 7.35).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002151","HPO_Synonym__c":"Increased blood lactate; Increased serum lactate","HPO_Name__c":"Increased circulating lactate concentration","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:611523","Feature__r":{"HPO_Description__c":"Difficulty to maintain correct position of the head while standing or sitting. Infant head lag is observed when the head seems to flop around or lags posteriorly behind the trunk. Several articles have maintained that head lag should be absent by age 3 to 4 months.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002421","HPO_Synonym__c":"Delay in head control; Delay in head righting; Infant head lag; Poor head control","HPO_Name__c":"Poor head control","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:611523","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:611523","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Partial or complete wasting (loss) of brain tissue that was once present.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012444","HPO_Synonym__c":"Brain degeneration; Brain wasting","HPO_Name__c":"Brain atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism","Mitochondrial"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism","Congenital Abnormality","Mitochondrial"],"Specialist":["Genetics","Neurology","Epilepsy","Pediatrics"],"Account":["Mitochondrial","Epilepsy"]},"synonyms":["congenital pontocerebellar hypoplasia type 6"," fatal infantile encephalopathy with mitochondrial respiratory chain defect"," fatal infantile encephalopathy with mitochondrial respiratory chain defects"," non-syndromic pontocerebellar hypoplasia caused by mutation in rars2"," pch6"," pch6 - pontocerebellar hypoplasia type 6"," rars2 non-syndromic pontocerebellar hypoplasia"]}