{"id":85490,"date":"2024-11-14T14:20:07","date_gmt":"2024-11-14T05:20:07","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/"},"modified":"2025-08-22T16:40:40","modified_gmt":"2025-08-22T07:40:40","slug":"7p22-1-microduplication-syndrome","status":"publish","type":"post","link":"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en","title":{"rendered":"\u00a07p22.1 Microduplication Syndrome"},"content":{"rendered":"\n<div style=\"border:solid #ffe6e6 0.8rem;background-color: #fff9f9;padding:3% 5%;margin:1rem 0 3rem;\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Article_Summary\" >Article Summary<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Overview\" >Overview<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Cause_of_the_Disease\" >Cause of the Disease<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Symptoms\" >Symptoms<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Developmental_Delays_and_Intellectual_Disabilities\" >Developmental Delays and Intellectual Disabilities<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Behavioral_Issues\" >Behavioral Issues<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Physical_Characteristics\" >Physical Characteristics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Heart_and_Kidney_Abnormalities\" >Heart and Kidney Abnormalities<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Treatment\" >Treatment<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Developmental_Support\" >Developmental Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Behavioral_Therapy_and_Psychological_Support\" >Behavioral Therapy and Psychological Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Cardiovascular_Management\" >Cardiovascular Management<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Prognosis\" >Prognosis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Burden_on_Parents\" >Burden on Parents<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Related_Disorders\" >Related Disorders<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Xq28_Deletion_Syndrome\" >Xq28 Deletion Syndrome<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\/#Risk_Management_During_Pregnancy\" >Risk Management During Pregnancy<\/a><\/li><\/ul><\/nav><\/div>\n<h2 style=\"margin-top:1rem;\"><span class=\"ez-toc-section\" id=\"Article_Summary\"><\/span>Article Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The 7p22.1 microduplication syndrome is an extremely rare genetic disorder caused by the duplication of specific genes in the 7p22.1 region of chromosome 7. Key symptoms include intellectual disability, delays in motor and speech development, and distinctive craniofacial abnormalities. This article provides a detailed explanation of the roles and impacts of related genes such as RNF216 and ACTB, as well as insights into diagnosis and potential treatment approaches.<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>7p22.1 microduplication syndrome is an extremely rare genetic condition caused by a duplication of a specific segment of chromosome 7, known as the 7p22.1 region. This duplication leads to the presence of extra copies of genes that play key roles in cellular processes, neurological development, and organ formation. As a result, normal growth and development are disrupted, often manifesting in complex clinical presentations.The syndrome is primarily associated with intellectual disabilities, delays in both motor and language development, and a distinct pattern of facial features. In some cases, individuals may also exhibit structural or functional abnormalities of the heart or kidneys. Scientific research has identified certain genes in this chromosomal region, such as <strong>RNF216<\/strong> and <strong>ACTB<\/strong>, as potentially significant in the development of symptoms. RNF216 is involved in protein regulation within cells, particularly in the nervous system, while ACTB encodes beta-actin, a protein critical for maintaining the structural framework of cells and facilitating normal cellular growth and movement. Disruption of these genes through duplication is believed to contribute directly to the clinical features observed.<\/p>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"640\" height=\"480\" src=\"\/nipt\/wp-content\/uploads\/2025\/01\/932854_s.jpg\" alt=\"\u30ea\u30dc\u30f3\" class=\"wp-image-90521\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cause_of_the_Disease\"><\/span><strong>Cause of the Disease<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>7p22.1 microduplication syndrome arises from a partial duplication of the 7p22.1 region on chromosome 7. The duplication increases the number of copies of certain genes, resulting in an imbalance that disrupts their normal expression. This genetic imbalance interferes with cellular signaling pathways and developmental processes, leading to the observed neurological, physical, and sometimes organ-specific abnormalities.<\/p>\n\n\n\n<p>The extent of symptoms can vary depending on the size of the duplicated segment and the specific genes involved. In genetics, this is referred to as <strong>variable expressivity<\/strong>, meaning that even within the same condition, clinical features may differ from one individual to another despite sharing the same chromosomal change.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Symptoms\"><\/span><strong>Symptoms<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Developmental_Delays_and_Intellectual_Disabilities\"><\/span><strong>Developmental Delays and Intellectual Disabilities<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Developmental delays are one of the earliest and most consistent signs of this syndrome. Infants and young children often take longer to achieve motor milestones, such as sitting, crawling, or walking. Language development is also frequently delayed, with some children requiring extensive speech therapy or alternative communication strategies to express themselves effectively. Intellectual disabilities typically range from mild to moderate, though the level of support needed in daily life varies significantly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Behavioral_Issues\"><\/span><strong>Behavioral Issues<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Behavioral difficulties are commonly reported among individuals with this condition. Many exhibit features consistent with <strong>autism spectrum disorder (ASD)<\/strong>, including challenges with social interaction, limited eye contact, repetitive movements, or rigid patterns of behavior. Others may display symptoms of <strong>attention deficit hyperactivity disorder (<a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/adhd-genetics-symptoms-support\/\">ADHD<\/a>)<\/strong>, such as difficulty concentrating, impulsivity, or hyperactive behavior. These behavioral characteristics are thought to result from the combined effect of duplicated genes that influence brain development and neuronal signaling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Physical_Characteristics\"><\/span><strong>Physical Characteristics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Physical features often provide important clinical clues. Children with 7p22.1 microduplication syndrome may have an unusually large head size, a condition known as <strong>macrocephaly<\/strong>, which is linked to abnormal growth regulation in the brain. A <strong>prominent forehead<\/strong> and <strong>wide-set eyes<\/strong>, a presentation called hypertelorism, are also common. Some individuals exhibit <strong>micrognathia<\/strong>, where the lower jaw is smaller than average, affecting facial structure and, in some cases, feeding or speech. These facial characteristics, while not harmful in themselves, assist clinicians in recognizing the syndrome during genetic and physical evaluations.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Heart_and_Kidney_Abnormalities\"><\/span><strong>Heart and Kidney Abnormalities<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Cardiac and renal anomalies are less common but clinically significant when present. Heart defects such as a <strong>patent foramen ovale<\/strong>, which is a small opening between the upper chambers of the heart, or an <strong>atrial septal defect<\/strong>, where there is an opening in the atrial wall, can impact circulation and require medical monitoring or surgical correction depending on severity. Abnormalities in kidney shape or function have also been documented, though these are typically identified through imaging studies rather than outward symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Treatment\"><\/span><strong>Treatment<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Developmental_Support\"><\/span><strong>Developmental Support<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Management of the condition is multidisciplinary, with early intervention being the cornerstone of care. Children benefit significantly from structured support programs that include speech therapy to enhance communication, occupational therapy to strengthen fine motor skills and daily living abilities, and physical therapy to improve balance, coordination, and muscle tone. These interventions, when started early, help maximize developmental potential and independence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Behavioral_Therapy_and_Psychological_Support\"><\/span><strong>Behavioral Therapy and Psychological Support<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>For behavioral and psychological symptoms, individualized therapy plans are essential. Children with features of ASD may respond well to applied behavior analysis or other structured behavioral programs designed to improve social skills and reduce disruptive patterns. Those with <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/adhd-genetics-symptoms-support\/\">ADHD<\/a> symptoms often benefit from behavioral therapy, structured routines, and, in some cases, pharmacological support under careful medical supervision. Emotional support and counseling are equally important for both the child and the family, helping to manage stress and build resilience in the face of ongoing care challenges.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cardiovascular_Management\"><\/span><strong>Cardiovascular Management<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Children diagnosed with cardiac abnormalities require regular follow-up with a pediatric cardiologist. Monitoring ensures that changes in heart structure or function are identified early, allowing for timely medical or surgical intervention if needed. This proactive approach significantly reduces the risk of complications and improves long-term outcomes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prognosis\"><\/span><strong>Prognosis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The overall prognosis varies but is closely tied to the timeliness and consistency of supportive care. With early diagnosis and coordinated interventions, many individuals experience notable progress in their developmental skills and enjoy improved quality of life. However, intellectual disabilities and certain behavioral or physical challenges often persist, making long-term support essential. Families typically benefit from periodic reassessment by specialists to adapt therapeutic approaches as the child grows and their needs evolve.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Burden_on_Parents\"><\/span><strong>Burden on Parents<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Caring for a child with 7p22.1 microduplication syndrome can be exhausting and deeply personal. The demands often stretch far beyond regular parenting. Families juggle a full schedule of therapy appointments, medical follow-ups, and meetings with educators, all while managing the day-to-day needs of their child. The financial impact can be significant, particularly when specialized care or adaptive equipment is required.<\/p>\n\n\n\n<p>The emotional weight is often harder to describe. Many parents speak of moments of isolation or uncertainty, especially when facing a condition so rare that few people around them truly understand it. This is why strong support systems are essential. Consistent guidance from healthcare providers and genetic counselors can help families make informed decisions. Equally important is connecting with parent support groups or advocacy organizations, where shared experiences and practical advice can ease the sense of navigating the unknown.<\/p>\n\n\n\n<p>These connections do not make the condition easier, but they can make the journey less lonely. Access to accurate information, reliable specialists, and a community that understands the challenges provides a foundation of support that helps families face both the everyday tasks and the unexpected turns that often come with this diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Related_Disorders\"><\/span><strong>Related Disorders<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Xq28_Deletion_Syndrome\"><\/span><strong>Xq28 Deletion Syndrome<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Xq28 deletion syndrome, another chromosomal disorder, results from the loss of genetic material in the Xq28 region of the X chromosome. Although distinct from 7p22.1 microduplication syndrome, it shares certain clinical features such as developmental delays, intellectual disabilities, and behavioral challenges. As with 7p22.1 microduplication, early therapeutic intervention and careful medical management play critical roles in optimizing developmental outcomes and quality of life.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risk_Management_During_Pregnancy\"><\/span><strong>Risk Management During Pregnancy<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>For families concerned about genetic risks during pregnancy, <strong>non-invasive prenatal testing (<a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a>)<\/strong> offers a safe and reliable screening method. By analyzing fragments of fetal DNA circulating in maternal blood, <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> can detect common chromosomal abnormalities early in gestation. While <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> does not diagnose rare duplications like 7p22.1 microduplication, it provides reassurance for many expectant parents and, in some cases, indicates when further diagnostic testing may be appropriate.<\/p>\n","protected":false},"excerpt":{"rendered":"Article Summary The &#8230;\n <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/7p22-1-microduplication-syndrome\/?lang=en\">\u7d9a\u304d\u3092\u8aad\u3080<\/a>","protected":false},"author":101,"featured_media":87961,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[97],"tags":[],"class_list":["post-85490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/85490","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/users\/101"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/comments?post=85490"}],"version-history":[{"count":14,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/85490\/revisions"}],"predecessor-version":[{"id":112004,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/85490\/revisions\/112004"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media\/87961"}],"wp:attachment":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media?parent=85490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/categories?post=85490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/tags?post=85490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}