{"Name":"Fatty acid hydroxylase-associated neurodegeneration","DiseaseID__c":"GARD:0010810","id":10810,"encodedName":"fatty-acid-hydroxylase-associated-neurodegeneration","IsDeleted":false,"Disease_Name_Full__c":"Fatty acid hydroxylase-associated neurodegeneration","Xref_IDs__c":"C188989; C3668943; C580102; MEDGEN:777150; MONDO:0017999; NBK56080; ORPHA:329308","USA_Estimate__c":"1,000","No_of_Specialist_Tagsa__c":7,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":1,"No_of_HHS_records__c":1,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":3,"No_of_Disease_Descriptions__c":2,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0017999","Disease_Description__c":"Fatty acid hydroxylase-associated neurodegeneration (FAHN) is a very rare, autosomal recessive form of neurodegeneration with brain iron accumulation (NBIA) characterized by childhood-onset focal dystonia, progressive spastic paraplegia that progresses to tetra paresis, ataxia, dysarthria, intellectual decline, and oculomotor disturbances (optic atrophy), accompanied by iron deposition in the globus pallidus.","GARD_Name__c":"Fatty acid hydroxylase-associated neurodegeneration","GARD_Synonym__c":"dysmyelinating leukodystrophy and spastic paraparesis; fahn; fatty acid hydroxylase associated neurodegeneration; spastic paraplegia 35","Curated_Disease_Description_Source__c":"MONDO:0017999","Curated_Disease_Description__c":"Fatty acid hydroxylase-associated neurodegeneration (FAHN) is a progressive disorder of the nervous system (neurodegeneration) characterized by problems with movement and vision that begin during childhood or adolescence. Changes in the way a person walks (gait) and frequent falls are usually the first noticeable signs of FAHN. Affected individuals gradually develop extreme muscle stiffness (spasticity) and exaggerated reflexes. They typically have involuntary muscle cramping (dystonia), problems with coordination and balance (ataxia), or both. The movement problems worsen over time, and some people with this condition eventually require wheelchair assistance. People with FAHN often develop vision problems, which occur due to deterioration (atrophy) of the nerves that carry information from the eyes to the brain (the optic nerves) and difficulties with the muscles that control eye movement. Affected individuals may have a loss of sharp vision (reduced visual acuity), decreased field of vision, impaired color perception, eyes that do not look in the same direction (strabismus), rapid involuntary eye movements (nystagmus), or difficulty moving the eyes intentionally (supranuclear gaze palsy). Speech impairment (dysarthria) also occurs in FAHN, and severely affected individuals may lose the ability to speak. People with this disorder may also have difficulty chewing or swallowing (dysphagia). In severe cases, they may develop malnutrition and require a feeding tube.  The swallowing difficulties can lead to a bacterial lung infection called aspiration pneumonia, which can be life-threatening. As the disorder progresses, some affected individuals experience seizures and a decline in intellectual function. Magnetic resonance imaging (MRI) of the brain in people with FAHN shows signs of iron accumulation, especially in an area of the brain called the globus pallidus, which is involved in regulating movement. Similar patterns of iron accumulation are seen in certain other neurological disorders such as infantile neuroaxonal dystrophy and pantothenate kinase-associated neurodegeneration. All these conditions belong to a class of disorders called neurodegeneration with brain iron accumulation (NBIA).","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:329308","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0017999","ORPHANET_ID__c":"ORPHA:329308","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Neurodegeneración asociada a hidroxilasa de ácidos grasos","Spanish_Description_Source__c":"ORPHA:329308","Spanish_Description__c":"Es una forma muy poco frecuente, autosómica recesiva, de neurodegeneración con acúmulo cerebral de hierro (NBIA, por sus siglas en inglés). Está caracterizada por distonía focal de inicio en la infancia, paraparesia espástica progresiva que evoluciona a una tetraparesia, ataxia, disartria, deterioro intelectual, y trastornos oculomotores (atrofia óptica), acompañados de deposición de hierro en el globo pálido.","Spanish_Disease_Name__c":"neurodegeneración asociada a hidroxilasa de ácidos grasos","Spanish_GARD_Synonym__c":"fahn","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":"Fatty acid hydroxylase-associated neurodegeneration (FAHN) is a progressive disorder of the nervous system (neurodegeneration) characterized by problems with movement and vision that begin during childhood or adolescence. Changes in the way a person walks (gait) and frequent falls are usually the first noticeable signs of FAHN. Affected individuals gradually develop extreme muscle stiffness (spasticity) and exaggerated reflexes. They typically have involuntary muscle cramping (dystonia), problems with coordination and balance (ataxia), or both. The movement problems worsen over time, and some people with this condition eventually require wheelchair assistance. People with FAHN often develop vision problems, which occur due to deterioration (atrophy) of the nerves that carry information from the eyes to the brain (the optic nerves) and difficulties with the muscles that control eye movement. Affected individuals may have a loss of sharp vision (reduced visual acuity), decreased field of vision, impaired color perception, eyes that do not look in the same direction (strabismus), rapid involuntary eye movements (nystagmus), or difficulty moving the eyes intentionally (supranuclear gaze palsy). Speech impairment (dysarthria) also occurs in FAHN, and severely affected individuals may lose the ability to speak. People with this disorder may also have difficulty chewing or swallowing (dysphagia). In severe cases, they may develop malnutrition and require a feeding tube.  The swallowing difficulties can lead to a bacterial lung infection called aspiration pneumonia, which can be life-threatening. As the disorder progresses, some affected individuals experience seizures and a decline in intellectual function. Magnetic resonance imaging (MRI) of the brain in people with FAHN shows signs of iron accumulation, especially in an area of the brain called the globus pallidus, which is involved in regulating movement. Similar patterns of iron accumulation are seen in certain other neurological disorders such as infantile neuroaxonal dystrophy and pantothenate kinase-associated neurodegeneration. All these conditions belong to a class of disorders called neurodegeneration with brain iron accumulation (NBIA).","Curated_Disease_Description_Source__c":"MONDO:0017999","GARD_Synonym__c":"dysmyelinating leukodystrophy and spastic paraparesis; fahn; fatty acid hydroxylase associated neurodegeneration; spastic paraplegia 35","Name":"Fatty acid hydroxylase-associated neurodegeneration","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Childhood Dementia Initiative","Website__c":"https://www.childhooddementia.org/"},{"Account_Name__c":"NBIA Disorders Association","Website__c":"https://www.nbiadisorders.org/"},{"Account_Name__c":"NBIAcure","Website__c":"https://nbiacure.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":"Ophthalmology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Psychiatry","Tag_Category__c":"Specialist"},{"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":"Hereditary Spastic Paraplegia","Tag_Category__c":"Account","curated_tag_name":"Hereditary spastic paraplegia"},{"Tag_Name__c":"Neuro-Ophthalmology","Tag_Category__c":"Specialist","curated_tag_name":"Neuro-ophthalmic diseases"},{"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":"Childhood","Provided_By__c":"ORPHA:329308"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:329308"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0010810","Source__c":"RareSource"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK121988","Xref__c":"NBK121988"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK56080","Source__c":"Gene Review","Xref__c":"NBK56080"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C3668943","Source__c":"C3668943","Xref__c":"C3668943"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=777150","Source__c":"C3668943","Xref__c":"MEDGEN:777150"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C580102","Source__c":"MONDO:0017999","Xref__c":"C580102"},{"URL__c":"https://www.orpha.net/en/disease/detail/329308","Source__c":"C3668943; MONDO:0017999; ORPHA:329308","Xref__c":"ORPHA:329308"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=702419001","Source__c":"C3668943","Xref__c":"702419001"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C188989","Source__c":"C3668943","Xref__c":"C188989"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0017999","Source__c":"GARD:0010810","Xref__c":"MONDO:0017999"},{"URL__c":"https://medlineplus.gov/genetics/condition/fatty-acid-hydroxylase-associated-neurodegeneration","Source__c":"GARD:0010810","Xref__c":"https://medlineplus.gov/genetics/condition/fatty-acid-hydroxylase-associated-neurodegeneration"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"FA2H","GHR_URL__c":"https://medlineplus.gov/genetics/gene/fa2h","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002478","HPO_Synonym__c":"Progressive spastic quadriparesis","HPO_Name__c":"Progressive spastic quadriplegia","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001123","HPO_Synonym__c":"Partial loss of field of vision; Visual field defects","HPO_Name__c":"Visual field defect","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","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":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007153","HPO_Name__c":"Progressive extrapyramidal movement disorder","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Frequently experiencing feelings of being down, miserable, and/or hopeless; struggling to recover from these moods; having a pessimistic outlook on the future; feeling a pervasive sense of shame; having a low self-worth; experiencing thoughts of suicide and engaging in suicidal behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000716","HPO_Synonym__c":"Depression; Depressive episode; Depressivity","HPO_Name__c":"Depression","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Bipolar disorder is an illness of mood characterized by alternating episodes of elevated and depressed moods, which are interspersed with euthymic periods.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007302","HPO_Synonym__c":"Bipolar depression; Bipolar disorder; Manic depressive","HPO_Name__c":"Bipolar affective disorder","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007924","HPO_Synonym__c":"Slow decrease in sharpness of vision; Subacute deterioration of visual acuity","HPO_Name__c":"Slow decrease in visual acuity","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","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:329308","HPO_Frequency__c":"Frequent (30-79%)","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:329308","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002527","HPO_Synonym__c":"Falls","HPO_Name__c":"Falls","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Wasting (atrophy) of the vermis of cerebellum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006855","HPO_Synonym__c":"Atrophy of cerebellar vermis; Atrophy of the cerebellar vermis; Vermian atrophy","HPO_Name__c":"Cerebellar vermis atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007199","HPO_Name__c":"Progressive spastic paraparesis","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Impairment of expressive language and relative preservation of receptive language abilities. That is, the patient understands language (speech, writing) but cannot express it.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002427","HPO_Synonym__c":"Broca's aphasia; Loss of expressive speech; Motor aphasia; Non-fluent aphasia","HPO_Name__c":"Expressive aphasia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","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:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000648","HPO_Synonym__c":"Optic nerve atrophy; Optic-nerve degeneration","HPO_Name__c":"Optic atrophy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Peripheral neuropathy is a general term for any disorder of the peripheral nervous system. The main clinical features used to classify peripheral neuropathy are distribution, type (mainly demyelinating versus mainly axonal), duration, and course.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009830","HPO_Synonym__c":"Peripheral nerve damage; Peripheral neuritis","HPO_Name__c":"Peripheral neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A type of gait ataxia displaying progression of clinical severity.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007240","HPO_Synonym__c":"Gait ataxia, progressive","HPO_Name__c":"Progressive gait ataxia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007020","HPO_Name__c":"Progressive spastic paraplegia","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A bilateral tonic-clonic seizure is a seizure defined by a tonic (bilateral increased tone, lasting seconds to minutes) and then a clonic (bilateral sustained rhythmic jerking) phase.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002069","HPO_Synonym__c":"Bilateral convulsive seizures; Generalised tonic-clonic seizure (without specification of onset); Generalized convulsion; Generalized tonic-clonic seizure (without specification of onset); Grand mal; Grand mal seizures; Seizures, tonic-clonic; Tonic-clonic convulsion; Tonic-clonic convulsions","HPO_Name__c":"Bilateral tonic-clonic seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of dystonia that affects all or most of the body.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007325","HPO_Name__c":"Generalized dystonia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Inability to walk in a person who previous had the ability to walk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002505","HPO_Synonym__c":"Loss of ability to walk","HPO_Name__c":"Loss of ambulation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A functional anomaly of the upper motor neuron. The upper motor neurons are neurons of the primary motor cortex which project to the brainstem and spinal chord via the corticonuclear, corticobulbar and corticospinal (pyramidal) tracts. They are involved in control of voluntary movements. Dysfunction leads to weakness, impairment of fine motor movements, spasticity, hyperreflexia and abnormal pyramidal signs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002493","HPO_Synonym__c":"Corticospinal tract dysfunction; Pyramidal tract dysfunction","HPO_Name__c":"Upper motor neuron dysfunction","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Occasional (5-29%)","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:329308","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:329308","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Intense feelings of nervousness, tension, or panic often arise in response to interpersonal stresses. There is worry about the negative effects of past unpleasant experiences and future negative possibilities. Individuals may feel fearful, apprehensive, or threatened by uncertainty, and they may also have fears of falling apart or losing control.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000739","HPO_Synonym__c":"Anxiety; Anxiousness; Excessive, persistent worry and fear","HPO_Name__c":"Anxiety","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A supranuclear gaze palsy is an inability to look in a particular direction as a result of cerebral impairment. There is a loss of the voluntary aspect of eye movements, but, as the brainstem is still intact, all the reflex conjugate eye movements are normal.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000605","HPO_Synonym__c":"Supranuclear gaze paralysis","HPO_Name__c":"Supranuclear gaze palsy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","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:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030584","HPO_Name__c":"Color vision test abnormality","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Nystagmus consisting of horizontal to-and-fro eye movements.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000666","HPO_Synonym__c":"Nystagmus, horizontal","HPO_Name__c":"Horizontal nystagmus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A defect in the motor ability that enables speech.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002425","HPO_Synonym__c":"Loss of articulate speech","HPO_Name__c":"Anarthria","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:329308","HPO_Frequency__c":"Uncommon (<1-4%)","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"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism"],"Specialist":["Genetics","Neurology","Ophthalmology","Psychiatry","Neuro-Ophthalmology","Neuromuscular medicine","Pediatrics"],"Account":["Hereditary Spastic Paraplegia"]},"synonyms":["dysmyelinating leukodystrophy and spastic paraparesis"," fahn"," fatty acid hydroxylase associated neurodegeneration"," spastic paraplegia 35"]}