{"Name":"Hereditary spastic paraplegia 26","DiseaseID__c":"GARD:0009587","id":9587,"encodedName":"hereditary-spastic-paraplegia-26","IsDeleted":false,"Disease_Name_Full__c":"Hereditary spastic paraplegia 26","Xref_IDs__c":"726607007; C1836632; C536862; DOID:0110777; MEDGEN:373138; MONDO:0012213; OMIM:609195; ORPHA:101006","USA_Estimate__c":"1,000","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":"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":8,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0012213","Disease_Description__c":"Autosomal recessive spastic paraplegia type 26 (SPG26) is a rare, complex type of hereditary spastic paraplegia characterized by the onset in childhood/adolescence (ages 2-19) of progressive spastic paraplegia associated mainly with mild to moderate cognitive impairment and developmental delay, cerebellar ataxia, dysarthria, and peripheral neuropathy. Less commonly reported manifestations include skeletal abnormalities (i.e. pes cavus, scoliosis), dyskinesia, dystonia, cataracts, cerebellar signs (i.e. saccadic dysfunction, nystagmus, dysmetria), bladder disturbances, and behavioral problems. SPG26 is caused by mutations in the <i>B4GALNT1</i> gene (12q13.3), encoding Beta-1, 4 N-acetylgalactosaminyltransferase 1.","GARD_Name__c":"Hereditary spastic paraplegia 26","GARD_Synonym__c":"autosomal recessive spastic paraplegia 26; autosomal recessive spastic paraplegia type 26; gm2 synthase deficiency; hereditary spastic paraplegia type 26; spastic paraplegia 26, autosomal recessive; spg26","Curated_Disease_Description_Source__c":"MONDO:0012213","Curated_Disease_Description__c":"Autosomal recessive spastic paraplegia type 26 (SPG26) is a rare, complex type of hereditary spastic paraplegia characterized by the onset in childhood/adolescence (ages 2-19) of progressive spastic paraplegia associated mainly with mild to moderate cognitive impairment and developmental delay, cerebellar ataxia, dysarthria, and peripheral neuropathy. Less commonly reported manifestations include skeletal abnormalities (i.e. pes cavus, scoliosis), dyskinesia, dystonia, cataracts, cerebellar signs (i.e. saccadic dysfunction, nystagmus, dysmetria), bladder disturbances, and behavioral problems. SPG26 is caused by mutations in the B4GALNT1 gene (12q13.3), encoding Beta-1, 4 N-acetylgalactosaminyltransferase 1.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Child and as a Teenager","SourceID__c":"ORPHA:101006","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0012213","ORPHANET_ID__c":"ORPHA:101006","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Paraplejía espástica autosómica recesiva tipo 26","Spanish_Description_Source__c":"ORPHA:101006","Spanish_Description__c":"Es una forma poco frecuente y compleja de paraparesia espástica hereditaria caracterizada por un inicio en la infancia/adolescencia (2-19 años de edad) de paraparesia espástica progresiva asociada principalmente a alteraciones cognitivas y retraso en el desarrollo de leves a moderados, ataxia cerebelosa, disartria, y neuropatía periférica. Algunos hallazgos descritos con menor frecuencia incluyen anomalías esqueléticas (tales como pie cavo, escoliosis), discinesia, distonía, cataratas, signos cerebelosos (tales como, disfunción sacádica, nistagmo, dismetría), disfunción vesical, y trastornos de conducta. La enfermedad está causada por mutaciones en el gen <i>B4GALNT1</i> (12q13.3), que codifica la beta-1, 4 N-acetilgalactosamina transferasa 1.","Spanish_Disease_Name__c":"paraplejía espástica autosómica recesiva tipo 26","Spanish_GARD_Synonym__c":"deficiencia de gm2 sintasa; spg26","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 26 (SPG26) is a rare, complex type of hereditary spastic paraplegia characterized by the onset in childhood/adolescence (ages 2-19) of progressive spastic paraplegia associated mainly with mild to moderate cognitive impairment and developmental delay, cerebellar ataxia, dysarthria, and peripheral neuropathy. Less commonly reported manifestations include skeletal abnormalities (i.e. pes cavus, scoliosis), dyskinesia, dystonia, cataracts, cerebellar signs (i.e. saccadic dysfunction, nystagmus, dysmetria), bladder disturbances, and behavioral problems. SPG26 is caused by mutations in the B4GALNT1 gene (12q13.3), encoding Beta-1, 4 N-acetylgalactosaminyltransferase 1.","Curated_Disease_Description_Source__c":"MONDO:0012213","GARD_Synonym__c":"autosomal recessive spastic paraplegia 26; autosomal recessive spastic paraplegia type 26; gm2 synthase deficiency; hereditary spastic paraplegia type 26; spastic paraplegia 26, autosomal recessive; spg26","Name":"Hereditary spastic paraplegia 26","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Spastic Paraplegia Foundation","Website__c":"https://sp-foundation.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":"Adolescent","Provided_By__c":"ORPHA:101006"},{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:101006"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C1836632"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0009587","Source__c":"RareSource"},{"URL__c":"https://www.orpha.net/en/disease/detail/101006","Source__c":"C1836632; MONDO:0012213; ORPHA:101006","Xref__c":"ORPHA:101006"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=373138","Source__c":"C1836632","Xref__c":"MEDGEN:373138"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0110777","Source__c":"MONDO:0012213","Xref__c":"DOID:0110777"},{"URL__c":"https://www.omim.org/entry/609195","Source__c":"C1836632; MONDO:0012213; ORPHA:101006","Xref__c":"OMIM:609195"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C1836632","Source__c":"C1836632","Xref__c":"C1836632"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=726607007","Source__c":"C1836632; MONDO:0012213","Xref__c":"726607007"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C536862","Source__c":"MONDO:0012213","Xref__c":"C536862"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0012213","Source__c":"GARD:0009587","Xref__c":"MONDO:0012213"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"B4GALNT1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000518","HPO_Synonym__c":"Cataracts; Clouding of the lens of the eye; Cloudy lens; Lens opacities; Lens opacity","HPO_Name__c":"Cataract","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","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:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality of the urinary system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000079","HPO_Synonym__c":"Urinary tract abnormalities; Urinary tract abnormality; Urinary tract anomalies","HPO_Name__c":"Abnormality of the urinary system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Reduction of neurologic reflexes such as the knee-jerk reaction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001265","HPO_Synonym__c":"Decreased reflex response; Decreased reflexes","HPO_Name__c":"Hyporeflexia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","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:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormally increased muscular tone that causes fixed abnormal postures. There is a slow, intermittent twisting motion that leads to exaggerated turning and posture of the extremities and trunk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001332","HPO_Synonym__c":"Dystonic movements","HPO_Name__c":"Dystonia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Amenorrhea due to loss of ovarian function before the age of 40. Primary ovarian insuficiency (POI) is a state of female hypergonadotropic hypogonadism. It can manifest as primary amenorrhea with onset before menarche or secondary amenorrhea.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008209","HPO_Synonym__c":"Climacterium praecox; Early menopause; Hypergonadotropic amenorrhea; Menopause praecox; Premature menopause; Premature ovarian failure; Primary ovarian insufficiency","HPO_Name__c":"Premature ovarian insufficiency","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced strength of muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001324","HPO_Synonym__c":"Muscle weakness; Muscular weakness","HPO_Name__c":"Muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A decrease in the ability to perceive vibration at the ankles. Clinically, this is usually tested with a tuning fork which vibrates at 128 Hz and is applied to the malleoli of the ankles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006938","HPO_Synonym__c":"Decreased vibration sense at ankles; Decreased vibration sense in feet; Impaired vibration sensation at ankles","HPO_Name__c":"Impaired vibration sensation at ankles","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","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":"ORPHA:101006","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of skeletal muscular atrophy (which is also known as amyotrophy).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003202","HPO_Synonym__c":"Amyotrophy; Amyotrophy involving the extremities; Muscle atrophy; Muscle atrophy, neurogenic; Muscle degeneration; Muscle hypotrophy; Muscle wasting; Muscular atrophy; Neurogenic muscle atrophy; Neurogenic muscle atrophy, especially in the lower limbs; Neurogenic muscular atrophy","HPO_Name__c":"Skeletal muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A movement disorder which consists of effects including diminished voluntary movements and the presence of involuntary movements.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100660","HPO_Synonym__c":"Disorder of involuntary muscle movements; Dyskinesis","HPO_Name__c":"Dyskinesia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Any structural abnormality of the cerebellum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001317","HPO_Synonym__c":"Abnormality of the cerebellum; Cerebellar abnormalities; Cerebellar abnormality; Cerebellar anomaly; Cerebellar signs","HPO_Name__c":"Abnormal cerebellum morphology","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","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:101006","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:101006","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Bilateral impairment of the function of the cranial nerves 9-12, which control musculature involved in eating, swallowing, and speech. Pseudobulbar paralysis is characterized clinically by dysarthria, dysphonia, and dysphagia with bifacial paralysis, and may be accompanied by Pseudobulbar behavioral symptoms such as enforced crying and laughing.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007024","HPO_Synonym__c":"Pseudobulbar palsy; Pseudobulbar syndrome","HPO_Name__c":"Pseudobulbar paralysis","Feature_System__c":"Nervous System; Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Frequent (30-79%)","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:101006","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. If the Babinski sign is present it can indicate damage to the corticospinal tract.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003487","HPO_Synonym__c":"Extensor plantar reflexes; Extensor plantar response; Extensor plantar responses; Positive Babinski sign","HPO_Name__c":"Babinski sign","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0040171","HPO_Synonym__c":"Decreased serum testosterone level; Decreased serum testosterone levels; Low serum testosterone level; Low serum testosterone levels","HPO_Name__c":"Decreased serum testosterone concentration","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:101006","HPO_Frequency__c":"Frequent (30-79%)","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":"ORPHA:101006","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:101006","HPO_Frequency__c":"Frequent (30-79%)","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"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology"],"Specialist":["Genetics","Neurology","Neurodevelopmental disabilities","Neuromuscular medicine","Pediatrics"],"Account":["Hereditary Spastic Paraplegia"]},"synonyms":["autosomal recessive spastic paraplegia 26"," autosomal recessive spastic paraplegia type 26"," gm2 synthase deficiency"," hereditary spastic paraplegia type 26"," spastic paraplegia 26, autosomal recessive"," spg26"]}