![]() Light and near responses are intact, and the degree of anisocoria is typically equal in light and dark. The exact cause is unknown, but it is thought to be due to transient asymmetric supranuclear inhibition of the Edinger-Westphal nucleus that controls the pupillary sphincter. It is a benign condition with a difference in pupil size of less than or equal to 1 mm. Physiologic (also known as simple or essential) anisocoria is the most common cause of unequal pupil sizes, affecting up to 20% of the population. An injury or lesion in either pathway may result in changes in pupil size. Generally, anisocoria is caused by impaired dilation (a sympathetic response) or impaired constriction (a parasympathetic response) of pupils. Thus, thorough clinical evaluation is important for appropriate diagnosis and management of the underlying cause. It is relatively common, and causes vary from benign physiologic anisocoria to potentially life-threatening emergencies. Health Literacy Online: A Guide for Simplifying the User Experience.Anisocoria indicates unequal pupil sizes. Department of Health and Human Services, Office of Disease Prevention and Health Promotion. Washington, DC: The National Academies Press. National Academies of Sciences, Engineering, and Medicine. Improving newborn screening laboratory test ordering and result reporting using health information exchange. Reference: Data from the Newborn Screening Coding and Terminology Guide is available here.Reference: MedGen Data Downloads and FTPĭata from the National Library of Medicine's Newborn Screening Coding and Terminology Guide is used to note if a disease is included on Federal or State recommendations for newborn screening testing.Kohler S, Gargano M, Matentzoglu N, et al., The Human Phenotype Ontology in 2021, Nucleic Acids Research, Volume 49, Issue D1, 8 January 2021, Pages D1207–D1217.ĭata from the National Center for Biotechnology Information's MedGen is used to provide genetic testing information available for a disease. Orphanet is an online database of rare diseases and orphan drugs. Reference: Access aggregated data from Orphanet at Orphadata.Reference: UMLS Vocabulary Standards and Mappings Downloadsĭata from Orphanet and Human Phenotype Ontology (HPO) are used to provide information on a disease's symptoms, genes, inheritance, population estimates, and more.The National Library of Medicine's Unified Medical Language System (UMLS) is used to classify and organize diseases and disease categories. Sometimes a person may have a pathogenic variant for an autosomal dominant disease and show no signs or symptoms of the disease. Typically, children who inherit a dominant variant will have the disease, but they may be more or less severely impacted than their parent. Mutation is an older term that is still sometimes used to mean pathogenic variant.Įach child of an individual with an autosomal dominant disease has a 50% (1 in 2) chance of inheriting the variant and the disease. Dominant means that only one copy of the responsible gene (causal gene) must have a disease-causing change (pathogenic variant) in order for a person to have the disease. Genes, like chromosomes, usually come in pairs. Autosomal means the gene is located on any chromosome except the X or Y chromosomes (sex chromosomes). In other cases, the disease occurs because of a new pathogenic variant (de novo) in the causal gene and there is no family history of the disease.Įach child of an individual with an autosomal dominant disease has a 50% (1 in 2) chance of inheriting the variant and the disease. In some cases, a person inherits the pathogenic variant from a parent who has the genetic disease. Mutation is an older term that is still sometimes used to mean pathogenic variant.
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