{"Name":"Purine-nucleoside phosphorylase deficiency","DiseaseID__c":"GARD:0004606","id":4606,"encodedName":"purine-nucleoside-phosphorylase-deficiency","IsDeleted":false,"Disease_Name_Full__c":"Purine-nucleoside phosphorylase deficiency","Xref_IDs__c":"60743005; C0268125; C176817; C562587; DOID:5813; MEDGEN:75653; MONDO:0013171; OMIM:613179; ORPHA:760","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":1,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":1,"No_of_Disease_Descriptions__c":5,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":3,"Description_Source__c":"MONDO:0013171","Disease_Description__c":"A rare immune disease characterized by progressive immunodeficiency leading to recurrent and opportunistic infections, autoimmunity and malignancy as well as neurologic manifestations.","GARD_Name__c":"Purine-nucleoside phosphorylase deficiency","GARD_Synonym__c":"deficiency of inosine phosphorylase; deficiency of purine-nucleoside phosphorylase; immunodeficiency due to purine nucleoside phosphorylase deficiency; np - nucleoside phosphorylase deficiency; np deficiency; nucleoside phosphorylase deficiency; pnp - purine nucleoside phosphorylase deficiency; pnp deficiency; pnpase deficiency; purine nucleoside phosphorylase deficiency","Curated_Disease_Description_Source__c":"GARD:0004606","Curated_Disease_Description__c":"Purine nucleoside phosphorylase deficiency is a disorder of the immune system called an immunodeficiency. Immunodeficiencies are conditions in which the immune system is not able to protect the body effectively from foreign invaders such as bacteria and viruses. People with purine nucleoside phosphorylase deficiency have low numbers of immune system cells called T cells, which normally recognize and attack foreign invaders to prevent infection. Some affected individuals also have low numbers of other immune system cells called B cells, which normally help fight infections by producing immune proteins called antibodies (or immunoglobulins). These proteins target foreign invaders and mark them for destruction. The most severely affected individuals, who lack T cells and B cells, have a serious condition called severe combined immunodeficiency (SCID). The shortage of immune system cells in people with purine nucleoside phosphorylase deficiency results in repeated and persistent infections typically beginning in infancy or early childhood. Infections most commonly affect the sinuses and lungs. These infections are often caused by 'opportunistic' organisms that ordinarily do not cause illness in people with a normal immune system. The infections can be very serious or life-threatening, and without successful treatment to restore immune function, children with purine nucleoside phosphorylase deficiency usually do not survive past childhood. Infants with purine nucleoside phosphorylase deficiency typically grow more slowly than healthy babies. About two-thirds of individuals with this condition also have neurological problems, which may include developmental delay, intellectual disability, difficulty with balance and coordination (ataxia), and muscle stiffness (spasticity). People with purine nucleoside phosphorylase deficiency are also at increased risk of developing autoimmune disorders, which occur when the immune system malfunctions and attacks the body's tissues and organs.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"at a variety of ages","SourceID__c":"ORPHA:760","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0013171","ORPHANET_ID__c":"ORPHA:760","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Deficiencia de purina nucleósido fosforilasa","Spanish_Description_Source__c":"ORPHA:760","Spanish_Description__c":"Es una enfermedad inmunitaria poco frecuente caracterizada por una inmunodeficiencia progresiva que conduce a infecciones recurrentes y oportunistas, autoinmunidad y neoplasias, así como a manifestaciones neurológicas.","Spanish_Disease_Name__c":"deficiencia de purina nucleósido fosforilasa","Spanish_GARD_Synonym__c":"deficiencia de pnp; deficiencia de pnpasa","Category_Linearization__c":"ORPHA:98004","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":"Purine nucleoside phosphorylase deficiency is a disorder of the immune system called an immunodeficiency. Immunodeficiencies are conditions in which the immune system is not able to protect the body effectively from foreign invaders such as bacteria and viruses. People with purine nucleoside phosphorylase deficiency have low numbers of immune system cells called T cells, which normally recognize and attack foreign invaders to prevent infection. Some affected individuals also have low numbers of other immune system cells called B cells, which normally help fight infections by producing immune proteins called antibodies (or immunoglobulins). These proteins target foreign invaders and mark them for destruction. The most severely affected individuals, who lack T cells and B cells, have a serious condition called severe combined immunodeficiency (SCID). The shortage of immune system cells in people with purine nucleoside phosphorylase deficiency results in repeated and persistent infections typically beginning in infancy or early childhood. Infections most commonly affect the sinuses and lungs. These infections are often caused by 'opportunistic' organisms that ordinarily do not cause illness in people with a normal immune system. The infections can be very serious or life-threatening, and without successful treatment to restore immune function, children with purine nucleoside phosphorylase deficiency usually do not survive past childhood. Infants with purine nucleoside phosphorylase deficiency typically grow more slowly than healthy babies. About two-thirds of individuals with this condition also have neurological problems, which may include developmental delay, intellectual disability, difficulty with balance and coordination (ataxia), and muscle stiffness (spasticity). People with purine nucleoside phosphorylase deficiency are also at increased risk of developing autoimmune disorders, which occur when the immune system malfunctions and attacks the body's tissues and organs.","Curated_Disease_Description_Source__c":"GARD:0004606","GARD_Synonym__c":"deficiency of inosine phosphorylase; deficiency of purine-nucleoside phosphorylase; immunodeficiency due to purine nucleoside phosphorylase deficiency; np - nucleoside phosphorylase deficiency; np deficiency; nucleoside phosphorylase deficiency; pnp - purine nucleoside phosphorylase deficiency; pnp deficiency; pnpase deficiency; purine nucleoside phosphorylase deficiency","Name":"Purine-nucleoside phosphorylase deficiency","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Metabolic Support UK","Website__c":"https://www.metabolicsupportuk.org"},{"Account_Name__c":"Immune Deficiency Foundation","Website__c":"https://www.primaryimmune.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":"Immunology","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":"Primary Immune Deficiencies","Tag_Category__c":"Account","curated_tag_name":"Primary immunodeficiency"},{"Tag_Name__c":"Neurodevelopmental disabilities","Tag_Category__c":"Specialist","curated_tag_name":"Neurodevelopmental disabilities"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:760"},{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:760"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:760"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C0268125"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0004606","Source__c":"RareSource"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C562587","Source__c":"MONDO:0013171","Xref__c":"C562587"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A5813","Source__c":"MONDO:0013171","Xref__c":"DOID:5813"},{"URL__c":"https://www.orpha.net/en/disease/detail/760","Source__c":"C0268125; MONDO:0013171; ORPHA:760","Xref__c":"ORPHA:760"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=75653","Source__c":"C0268125","Xref__c":"MEDGEN:75653"},{"URL__c":"https://www.omim.org/entry/613179","Source__c":"C0268125; MONDO:0013171; ORPHA:760","Xref__c":"OMIM:613179"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C176817","Source__c":"C0268125; MONDO:0013171","Xref__c":"C176817"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=60743005","Source__c":"C0268125; MONDO:0013171","Xref__c":"60743005"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C0268125","Source__c":"C0268125","Xref__c":"C0268125"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0013171","Source__c":"GARD:0004606","Xref__c":"MONDO:0013171"},{"URL__c":"https://medlineplus.gov/genetics/condition/purine-nucleoside-phosphorylase-deficiency","Source__c":"GARD:0004606","Xref__c":"https://medlineplus.gov/genetics/condition/purine-nucleoside-phosphorylase-deficiency"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"PNP","GHR_URL__c":"https://medlineplus.gov/genetics/gene/pnp","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An organ or organ-system abnormality that consists of uncontrolled autonomous cell-proliferation which can occur in any part of the body as a benign or malignant neoplasm (tumor).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002664","HPO_Synonym__c":"Neoplasia; Oncological abnormality; Tumor; Tumour","HPO_Name__c":"Neoplasm","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","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:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An anomaly of the control or production of movement in the central nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011442","HPO_Synonym__c":"Abnormality of central motor function","HPO_Name__c":"Abnormal central motor function","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased susceptibility to infections as manifested by repeated bouts of infection.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002719","HPO_Synonym__c":"Frequent infections; Frequent, severe infections; Increased frequency of infection; infections, recurrent; Predisposition to infections; Recurrent infections; Susceptibility to infection","HPO_Name__c":"Recurrent infections","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A general term referring to a defect in immunity resulting from impaired antibody production.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005363","HPO_Name__c":"Humoral immunodeficiency","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hyperactivity is a condition characterized by constant and unusually high levels of activity, even in situations where it is deemed inappropriate.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000752","HPO_Synonym__c":"Hyperactive behavior; Hyperkinetic disorder; More active than typical","HPO_Name__c":"Hyperactivity","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An increased susceptibility to respiratory infections as manifested by a history of recurrent respiratory infections.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002205","HPO_Synonym__c":"Frequent respiratory infections; Multiple respiratory infections; Recurrent respiratory infections; respiratory infections, recurrent; Susceptibility to respiratory infections","HPO_Name__c":"Recurrent respiratory infections","Feature_System__c":"Respiratory system; Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Cerebral palsy describes a group of permanent disorders of the development of movement and posture, causing activity limitation, that are attributed to nonprogressive disturbances that occurred in the developing fetal or infant brain. The motor disorders of cerebral palsy are often accompanied by disturbances of sensation, perception, cognition, communication, and behavior, by epilepsy, and by secondary musculoskeletal problems.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100021","HPO_Synonym__c":"Cerebral paralysis; CP","HPO_Name__c":"Cerebral palsy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0032166","HPO_Synonym__c":"Unusual GI infection","HPO_Name__c":"Unusual gastrointestinal infection","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atypical behavior is an abnormality in a person's actions that can be controlled or modulated by the will of the individual. 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:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of primary immune deficiency that is characterized by a more severe defect in both the T- and B-lymphocyte systems.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004430","HPO_Synonym__c":"Immunodeficiency, severe combined","HPO_Name__c":"Severe combined immunodeficiency","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A reduced number of lymphocytes in the blood.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001888","HPO_Synonym__c":"Absolute lymphocyte count decrease; Decreased blood lymphocyte number; Low lymphocyte number; Lymphocytopenia; Lymphopenia","HPO_Name__c":"Decreased total lymphocyte count","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","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:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition in which there is increased muscle tone so that arms or legs, for example, are stiff and difficult to move.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001276","HPO_Synonym__c":"Hypertonicity; Increased muscle tone","HPO_Name__c":"Hypertonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of the nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000707","HPO_Synonym__c":"Abnormality of the nervous system; Neurologic abnormalities; Neurological abnormality","HPO_Name__c":"Abnormality of the nervous system","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"The presence of thrombocytopenia in combination with detection of antiplatelet antibodies.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001973","HPO_Synonym__c":"Idiopathic thrombocytopenia; Immune thrombocytopenia","HPO_Name__c":"Autoimmune thrombocytopenia","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Decreased concentration of urate in the urine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011935","HPO_Name__c":"Decreased urinary urate","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001263","HPO_Synonym__c":"Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; GDD; Lack of psychomotor development; Motor and developmental delay; Motormental retardation; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development","HPO_Name__c":"Global developmental delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"A chronic, relapsing, inflammatory, and often febrile multisystemic disorder of connective tissue, characterized principally by involvement of the skin, joints, kidneys, and serosal membranes.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002725","HPO_Synonym__c":"SLE","HPO_Name__c":"Systemic lupus erythematosus","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Sudden impairment of blood flow to a part of the brain due to occlusion or rupture of an artery to the brain.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001297","HPO_Synonym__c":"Cerebral vascular events; Cerebrovascular accident; Stroke","HPO_Name__c":"Stroke","Feature_System__c":"Nervous System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormally low level of uric acid in the blood.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003537","HPO_Synonym__c":"Low blood uric acid levels","HPO_Name__c":"Hypouricemia","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormal increase or decrease of total or subset T cell count. T cells are commonly characterized as CD3+ lymphocytes, or their subpopulations, in the blood, compared to a reference range for a given sex and age-group, measured ex vivo. These may include both TCR alpha/beta and gamma/delta T cells.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002843","HPO_Synonym__c":"Abnormal T cells; Abnormality of T cells; Cellular immune defect; Defective cellular immunity","HPO_Name__c":"Abnormal T cell morphology","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The occurrence of an immune reaction against the organism's own cells or tissues.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002960","HPO_Synonym__c":"Autoimmune condition; Autoimmune disease; Autoimmune disorder; Autoimmunity","HPO_Name__c":"Autoimmunity","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Partial loss of the ability to move the lower limbs accompanied by spasticity of the lower limbs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002313","HPO_Name__c":"Spastic paraparesis","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"A type of hearing impairment in one or both ears related to an abnormal functionality of the cochlear nerve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000407","HPO_Synonym__c":"Hearing loss, sensorineural; Sensorineural deafness; Sensorineural hearing loss","HPO_Name__c":"Sensorineural hearing impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An autoimmune form of hemolytic anemia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001890","HPO_Synonym__c":"Autoimmune haemolytic anemia; Hemolytic anemia, autoimmune","HPO_Name__c":"Autoimmune hemolytic anemia","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:760","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The absolute number of T cells per volume is below the lower limit of normal.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005403","HPO_Synonym__c":"Decrease in T cell count; Decrease in T cell number; Decreased numbers of circulating T cells; Low T cell count; Reduced number of T cells; T cell lymphopenia; T lymphocytopenia","HPO_Name__c":"Decreased total T cell count","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism"],"Specialist":["Genetics","Neurology","Immunology","Neurodevelopmental disabilities","Pediatrics"],"Account":["Primary Immune Deficiencies"]},"synonyms":["deficiency of inosine phosphorylase"," deficiency of purine-nucleoside phosphorylase"," immunodeficiency due to purine nucleoside phosphorylase deficiency"," np - nucleoside phosphorylase deficiency"," np deficiency"," nucleoside phosphorylase deficiency"," pnp - purine nucleoside phosphorylase deficiency"," pnp deficiency"," pnpase deficiency"," purine nucleoside phosphorylase deficiency"]}