{"Name":"Hereditary spastic paraplegia 11","DiseaseID__c":"GARD:0004919","id":4919,"encodedName":"hereditary-spastic-paraplegia-11","IsDeleted":false,"Disease_Name_Full__c":"Hereditary spastic paraplegia 11","Xref_IDs__c":"715491000; C148317; C1858479; DOID:0110764; MEDGEN:388073; MONDO:0011445; OMIM:604360; ORPHA:2822","USA_Estimate__c":"5,000","No_of_Specialist_Tagsa__c":5,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":2,"World_Estimate__c":"8,000 to 80,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":2,"No_of_Disease_Descriptions__c":5,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":4,"Description_Source__c":"MONDO:0011445","Disease_Description__c":"Any hereditary spastic paraplegia in which the cause of the disease is a mutation in the SPG11 gene.","GARD_Name__c":"Hereditary spastic paraplegia 11","GARD_Synonym__c":"autosomal recessive hereditary spastic paraplegia, mental impairment, and thin corpus callosum; autosomal recessive spastic paraplegia 11; autosomal recessive spastic paraplegia complicated with thin corpus callosum; autosomal recessive spastic paraplegia type 11; autosomal recessive spastic paraplegia with mental impairment and thin corpus callosum; hereditary spastic paraplegia caused by mutation in spg11; hereditary spastic paraplegia type 11; hsp-tcc; nakamura osame syndrome; nakamura-osame syndrome; spastic paraplegia 11; spastic paraplegia-intellectual disability-thin corpus callosum syndrome; spastic paraplegia,  mental retardation and thin corpus callosum; spastic paraplegia, autosomal recessive, complicated, with thin corpus callosum; spastic paraplegia, autosomal recessive, with mental impairment and thin corpus callosum; spg11; spg11 hereditary spastic paraplegia; spg11-related hereditary spastic paraplegia with thin corpus callosum","Curated_Disease_Description_Source__c":"GARD:0004919","Curated_Disease_Description__c":"Autosomal recessive spastic paraplegia type 11 (Autosomal recessive SPG11) is a form of hereditary spastic paraplegia. People with Autosomal recessive SPG11 experience worsening muscle stiffness leading to eventual paralysis of the lower limbs, as well as a range of other neurologic symptoms that may include intellectual disability, speech difficulties (dysarthria), and reduced bladder control. Additionally, the tissue connecting the left and right halves of the brain (corpus callosum) is abnormally thin in most individuals with Autosomal recessive SPG11. Autosomal recessive SPG11 is caused by genetic changes in the SPG11 gene and is inherited in an autosomal recessive fashion.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"5,000","Age_at_Onset_Snippet_Text__c":"at a variety of ages","SourceID__c":"ORPHA:2822","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0011445","ORPHANET_ID__c":"ORPHA:2822","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Paraplejía espástica autosómica recesiva tipo 11","Spanish_Description_Source__c":null,"Spanish_Description__c":null,"Spanish_Disease_Name__c":"paraplejía espástica autosómica recesiva tipo 11","Spanish_GARD_Synonym__c":"spg11; síndrome de nakamura-osame; síndrome de paraparesia espástica-discapacidad intelectual-adelgazamiento del cuerpo calloso; síndrome de paraplejía espástica-discapacidad intelectual-cuerpo calloso delgado","Category_Linearization__c":"ORPHA:98006","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":"Autosomal recessive spastic paraplegia type 11 (Autosomal recessive SPG11) is a form of hereditary spastic paraplegia. People with Autosomal recessive SPG11 experience worsening muscle stiffness leading to eventual paralysis of the lower limbs, as well as a range of other neurologic symptoms that may include intellectual disability, speech difficulties (dysarthria), and reduced bladder control. Additionally, the tissue connecting the left and right halves of the brain (corpus callosum) is abnormally thin in most individuals with Autosomal recessive SPG11. Autosomal recessive SPG11 is caused by genetic changes in the SPG11 gene and is inherited in an autosomal recessive fashion.","Curated_Disease_Description_Source__c":"GARD:0004919","GARD_Synonym__c":"autosomal recessive hereditary spastic paraplegia, mental impairment, and thin corpus callosum; autosomal recessive spastic paraplegia 11; autosomal recessive spastic paraplegia complicated with thin corpus callosum; autosomal recessive spastic paraplegia type 11; autosomal recessive spastic paraplegia with mental impairment and thin corpus callosum; hereditary spastic paraplegia caused by mutation in spg11; hereditary spastic paraplegia type 11; hsp-tcc; nakamura osame syndrome; nakamura-osame syndrome; spastic paraplegia 11; spastic paraplegia-intellectual disability-thin corpus callosum syndrome; spastic paraplegia,  mental retardation and thin corpus callosum; spastic paraplegia, autosomal recessive, complicated, with thin corpus callosum; spastic paraplegia, autosomal recessive, with mental impairment and thin corpus callosum; spg11; spg11 hereditary spastic paraplegia; spg11-related hereditary spastic paraplegia with thin corpus callosum","Name":"Hereditary spastic paraplegia 11","Curated_USA_Estimate__c":"5,000","estimateUsa":"5,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Childhood Dementia Initiative","Website__c":"https://www.childhooddementia.org/"},{"Account_Name__c":"Spastic Paraplegia Foundation","Website__c":"https://sp-foundation.org/"},{"Account_Name__c":"Ataxia UK","Website__c":"https://www.ataxia.org.uk/"},{"Account_Name__c":"HSP Research Foundation","Website__c":"https://hspersunite.org.au/"},{"Account_Name__c":"The Hereditary Spastic Paraplegia Support Group","Website__c":"https://hspgroup.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":"Hereditary Spastic Paraplegia","Tag_Category__c":"Account","curated_tag_name":"Hereditary spastic paraplegia"},{"Tag_Name__c":"Neurodevelopmental disabilities","Tag_Category__c":"Specialist","curated_tag_name":"Neurodevelopmental disabilities"},{"Tag_Name__c":"Neuromuscular medicine","Tag_Category__c":"Specialist","curated_tag_name":"Neuromuscular medicine"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:2822"},{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:2822"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:2822"},{"Age_At_Onset__c":"Adult","Provided_By__c":"ORPHA:2822"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0004919","Source__c":"RareSource"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1210","Source__c":"Gene Review","Xref__c":"NBK1210"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=715491000","Source__c":"MONDO:0011445","Xref__c":"715491000"},{"URL__c":"https://www.orpha.net/en/disease/detail/2822","Source__c":"C1858479; MONDO:0011445","Xref__c":"ORPHA:2822"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C1858479","Source__c":"C1858479","Xref__c":"C1858479"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0110764","Source__c":"MONDO:0011445","Xref__c":"DOID:0110764"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C148317","Source__c":"C1858479; MONDO:0011445","Xref__c":"C148317"},{"URL__c":"https://www.omim.org/entry/604360","Source__c":"C1858479; MONDO:0011445; ORPHA:2822","Xref__c":"OMIM:604360"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=388073","Source__c":"C1858479","Xref__c":"MEDGEN:388073"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0011445","Source__c":"GARD:0004919","Xref__c":"MONDO:0011445"},{"URL__c":"https://medlineplus.gov/genetics/condition/spastic-paraplegia-type-11"},{"URL__c":"https://medlineplus.gov/genetics/condition/spastic-paraplegia-type-11","Source__c":"GARD:0004919","Xref__c":"https://medlineplus.gov/genetics/condition/spastic-paraplegia-type-11"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"SPG11","GHR_URL__c":"https://medlineplus.gov/genetics/gene/spg11","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Weakness of the muscles of the legs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007340","HPO_Synonym__c":"Leg weakness; Lower extremity weakness; Lower limb muscle weakness; Lower limb weakness; Muscle weakness in lower limbs","HPO_Name__c":"Lower limb muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Atrophy of the frontal cortex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006913","HPO_Synonym__c":"Frontal cortex degeneration","HPO_Name__c":"Frontal cortical atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Increased body weight with a body mass index of 25-29.9 kg per square meter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0025502","HPO_Name__c":"Overweight","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","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":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000486","HPO_Synonym__c":"Cross-eyed; Squint; Squint eyes","HPO_Name__c":"Strabismus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Mild intellectual disability (ID) is defined as a type of ID characterized by mildly sub-average adaptive functioning and intellectual functioning, with an intelligence quotient (IQ) the range of 50-69.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001256","HPO_Synonym__c":"Intellectual disability, mild; Mental retardation, borderline-mild; Mild and nonprogressive mental retardation; Mild mental retardation","HPO_Name__c":"Mild intellectual disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of characteristic findings of denervation on electromyography (fibrillations, positive sharp waves, and giant motor unit potentials).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003445","HPO_Synonym__c":"EMG: neurogenic abnormalities; EMG: neurogenic changes; EMG: neurogenic findings","HPO_Name__c":"EMG: neuropathic changes","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007141","HPO_Synonym__c":"Mixed polyneuropathy; Nerve damage causing decreased feeling and movement; Sensorimotor peripheral neuropathy","HPO_Name__c":"Sensorimotor neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","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":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Loss of previously present mental abilities, generally in adults.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001268","HPO_Synonym__c":"Cognitive decline; Cognitive decline, progressive; Intellectual deterioration; Mental deterioration; Progressive cognitive decline","HPO_Name__c":"Mental deterioration","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001260","HPO_Synonym__c":"Difficulty articulating speech; Dysarthric speech","HPO_Name__c":"Dysarthria","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Unstable emotional experiences and frequent mood changes; emotions that are easily aroused, intense, and/or disproportionate to events and circumstances.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000712","HPO_Name__c":"Emotional lability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Spasticity that increases in degree with time.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002191","HPO_Synonym__c":"Spasticity, progressive","HPO_Name__c":"Progressive spasticity","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030455","HPO_Name__c":"Abnormality of pattern visual evoked potentials","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A neurological condition related to lesions of the basal ganglia leading to typical abnormalities including akinesia (inability to initiate changes in activity and perform volitional movements rapidly and easily), muscular rigidity (continuous contraction of muscles with constant resistance to passive movement), chorea (widespread arrhythmic movements of a forcible, rapid, jerky, and restless nature), athetosis (inability to sustain the muscles of the fingers, toes, or other group of muscles in a fixed position), and akathisia (inability to remain motionless).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002071","HPO_Synonym__c":"Extrapyramidal dysfunction; Extrapyramidal signs; Extrapyramidal symptoms; Extrapyramidal syndrome; Extrapyramidal tract signs","HPO_Name__c":"Abnormality of extrapyramidal motor function","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Localized fluid retention and tissue swelling caused by a compromised lymphatic system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001004","HPO_Synonym__c":"Lymphatic obstruction; Lymphoedema; Onset of lymphedema around puberty; Swelling caused by excess lymph fluid under skin","HPO_Name__c":"Lymphedema","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A brighter than expected signal on magnetic resonance imaging emanating from the cerebral white matter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030890","HPO_Synonym__c":"White matter hyperintensity","HPO_Name__c":"Hyperintensity of cerebral white matter on MRI","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Imaging_MRI"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A structural anomaly of the substantia nigra, which is a midbrain dopaminergic nucleus which has a critical role in modulating motor movement and reward functions as part of the basal ganglia circuitry.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0045007","HPO_Synonym__c":"Abnormality of the substantia nigra","HPO_Name__c":"Abnormal substantia nigra morphology","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007178","HPO_Synonym__c":"Peripheral motor neuropathy","HPO_Name__c":"Motor polyneuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000639","HPO_Synonym__c":"Involuntary, rapid, rhythmic eye movements","HPO_Name__c":"Nystagmus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced attention span characterized by distractibility and impulsivity.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000736","HPO_Synonym__c":"Easily distracted; Easy distractibility; High distractibility; Poor attention span; Problem paying attention; Short attention span","HPO_Name__c":"Short attention span","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Muscular atrophy affecting muscles in the distal portions of the extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003693","HPO_Synonym__c":"Amyotrophy of distal limb muscles; Distal amyotrophy, especially of the hands and feet; Distal limb muscle atrophy; Distal muscle atrophy; Distal muscle atrophy, upper and lower limbs; Distal muscle degeneration; Distal muscle wasting; Distal muscular atrophy; Muscle atrophy, distal","HPO_Name__c":"Distal amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Characteristic neurologic anomaly resulting from degeneration of dopamine-generating cells in the substantia nigra, a region of the midbrain, characterized clinically by shaking, rigidity, slowness of movement and difficulty with walking and gait.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001300","HPO_Name__c":"Parkinsonism","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A form of hypotension characterized by a sudden fall in blood pressure that occurs when a person assumes a standing position.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001278","HPO_Synonym__c":"Decrease in blood pressure upon standing up; 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While abnormal behaviors can be difficult to control, they are distinct from other abnormal actions that cannot be affected by the individual's will.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000708","HPO_Synonym__c":"Behavioral abnormality; Behavioral changes; Behavioral disorders; Behavioral disturbances; Behavioral problems; Behavioral symptoms; Behavioral/psychiatric abnormalities; Behavioural symptoms; Behavioural/Psychiatric abnormality; Psychiatric disorders; Psychiatric disturbances","HPO_Name__c":"Atypical behavior","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Incapability to ambulate.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002540","HPO_Synonym__c":"Inability to walk; Non-ambulatory","HPO_Name__c":"Inability to walk","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An impairment of memory as manifested by a reduced ability to remember things such as dates and names, and increased forgetfulness.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002354","HPO_Synonym__c":"Amnesia; Forgetfulness; Memory impairment; Memory loss; Memory problems; Poor memory","HPO_Name__c":"Memory impairment","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A lighter than expected T2 signal on magnetic resonance imaging (MRI) of the basal ganglia. This term refers to a localized hyperintensity affecting a particular region of the basal ganglia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007183","HPO_Name__c":"Focal T2 hyperintense basal ganglia lesion","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Imaging_MRI"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Partial or complete wasting (loss) of hypothalamus tissue that was once present.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0025058","HPO_Synonym__c":"Atrophy of the hypothalamus","HPO_Name__c":"Hypothalamic atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The term gait disturbance can refer to any disruption of the ability to walk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001288","HPO_Synonym__c":"Abnormal gait; Abnormal walk; Difficulty in walking; Gait abnormalities; Gait difficulties; Gait disturbances; Impaired gait; Walking disability","HPO_Name__c":"Gait disturbance","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","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":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Accumulation of substantial excess body fat.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001513","HPO_Synonym__c":"Having too much body fat; Obesity","HPO_Name__c":"Obesity","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Ataxia refers to impaired coordination of voluntary muscle movement. Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001251","HPO_Synonym__c":"Cerebellar ataxia","HPO_Name__c":"Ataxia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Impairment of certain skills such as reading or writing, coordination, self-control, or attention that interfere with the ability to learn. The impairment is not related to a global deficiency of intelligence.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001328","HPO_Name__c":"Specific learning disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition characterized by changes in personality and thought patterns, often accompanied by hallucinations and delusional beliefs, is known as psychosis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000709","HPO_Synonym__c":"Psychosis","HPO_Name__c":"Psychosis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006827","HPO_Synonym__c":"Degeneration of the spinal cord","HPO_Name__c":"Atrophy of the spinal cord","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006956","HPO_Synonym__c":"Dilatation of lateral cerebral ventricles; Dilation of lateral ventricles; Enlarged lateral ventricles; Lateral ventricle dilatation","HPO_Name__c":"Lateral ventricle dilatation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000505","HPO_Synonym__c":"Impaired vision; Loss of eyesight; Poor vision; Visual impairment","HPO_Name__c":"Visual impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A loss of global cognitive ability of sufficient amount to interfere with normal social or occupational function. Dementia represents a loss of previously present cognitive abilities, generally in adults, and can affect memory, thinking, language, judgment, and behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000726","HPO_Synonym__c":"Dementia; Dementia, progressive; Progressive dementia","HPO_Name__c":"Dementia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Electromyographic (EMG) findings characteristic of axonal neuropathy, with normal or slightly decreased nerve conduction velocities, normal or slightly prolonged distal latencies, but significantly reduced motor potentials and sensory amplitudes. There may be spontaneous activity upon needle EMG studies, such as increased insertional activity, positive sharp waves, and fibrillation potentials.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003482","HPO_Name__c":"EMG: axonal abnormality","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Generalized (unlocalized) atrophy affecting muscles of the limbs in both proximal and distal locations.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009055","HPO_Synonym__c":"Generalized muscle atrophy, proximal and distal; Generalized muscle wasting","HPO_Name__c":"Generalized limb muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A nonspecific term denoting progressive loss of the retinal pigment epithelium (RPE) and/or neurosensory retinal cells.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000546","HPO_Synonym__c":"Retina degeneration","HPO_Name__c":"Retinal degeneration","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Weakness or partial paralysis in the lower limbs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002385","HPO_Synonym__c":"Partial paralysis of legs","HPO_Name__c":"Paraparesis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","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":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of tracking eye movements in which smooth pursuit is interrupted by an abnormally high number of saccadic movements.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001152","HPO_Synonym__c":"Saccadic pursuit movements; Saccadic slow pursuit; Saccadic smooth pursuit","HPO_Name__c":"Saccadic smooth pursuit interruptions","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased intensity of the a reflex in the arm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007350","HPO_Synonym__c":"Hyperreflexia in upper limbs","HPO_Name__c":"Upper limb hyperreflexia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:2822","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormality characterized by disruption of the normal functioning of peripheral axons.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003477","HPO_Synonym__c":"Axonal neuropathy; Axonal peripheral neuropathy","HPO_Name__c":"Peripheral axonal neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology"],"Specialist":["Genetics","Neurology","Neurodevelopmental disabilities","Neuromuscular medicine","Pediatrics"],"Account":["Hereditary Spastic Paraplegia"]},"synonyms":["autosomal recessive hereditary spastic paraplegia, mental impairment, and thin corpus callosum"," autosomal recessive spastic paraplegia 11"," autosomal recessive spastic paraplegia complicated with thin corpus callosum"," autosomal recessive spastic paraplegia type 11"," autosomal recessive spastic paraplegia with mental impairment and thin corpus callosum"," hereditary spastic paraplegia caused by mutation in spg11"," hereditary spastic paraplegia type 11"," hsp-tcc"," nakamura osame syndrome"," nakamura-osame syndrome"," spastic paraplegia 11"," spastic paraplegia-intellectual disability-thin corpus callosum syndrome"," spastic paraplegia,  mental retardation and thin corpus callosum"," spastic paraplegia, autosomal recessive, complicated, with thin corpus callosum"," spastic paraplegia, autosomal recessive, with mental impairment and thin corpus callosum"," spg11"," spg11 hereditary spastic paraplegia"," spg11-related hereditary spastic paraplegia with thin corpus callosum"]}