{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T22:21:08Z","timestamp":1789770068236,"version":"4.0.1"},"reference-count":17,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2022,5,10]],"date-time":"2022-05-10T00:00:00Z","timestamp":1652140800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Children"],"abstract":"<jats:p>In the literature, deletions in the 2p16.3 region of the neurexin gene (NRXN1) are associated with cognitive impairment, and other neuropsychiatric disorders, such as schizophrenia, autism, and Pitt\u2013Hopkins-like syndrome 2. In this paper, we present twins with deletion 2p16.3 of the NRXN1 gene using a comparative genomic hybridization array. The two children had a dual diagnosis consisting of mild cognitive impairment and neurodevelopmental delay. Furthermore, they showed a dysmorphic phenotype characterized by facio-cranial disproportion, turricephalus, macrocrania, macrosomia, strabismus, and abnormal conformation of both auricles with low implantation. The genetic analysis of the family members showed the presence, in the father\u2019s genetic test, of a microdeletion of the short arm of chromosome 2, in the 2p16.3 region. Our case report can expand the knowledge on the genotype\u2013phenotype association in carriers of 2p16.3 deletion and for genetic counseling that could help in the prevention and eventual treatment of this genetic condition. Newborn carriers should undergo neurobehavioral follow-ups for timely detection of warning signs.<\/jats:p>","DOI":"10.3390\/children9050698","type":"journal-article","created":{"date-parts":[[2022,5,10]],"date-time":"2022-05-10T08:31:55Z","timestamp":1652171515000},"page":"698","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["NRXN1 Deletion in Two Twins\u2019 Genotype and Phenotype: A Clinical Case and Literature Review"],"prefix":"10.3390","volume":"9","author":[{"given":"Monica","family":"Sciacca","sequence":"first","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Section of Pediatrics and Child Neuropsychiatry, University of Catania, 95100 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lidia","family":"Marino","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Section of Pediatrics and Child Neuropsychiatry, University of Catania, 95100 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4181-6287","authenticated-orcid":false,"given":"Giovanna","family":"Vitaliti","sequence":"additional","affiliation":[{"name":"Section of Pediatrics, Department of Medical Sciences, Sant\u2019Anna University Hospital, University of Ferrara, 44121 Ferrara, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raffaele","family":"Falsaperla","sequence":"additional","affiliation":[{"name":"Neonatal Intensive Care Unit, AOU \u201cPoliclinico\u201d, PO \u201cSan Marco\u201d, University of Catania, 95100 Catania, Italy"},{"name":"Unit of Pediatrics and Pediatric Emergency, AOU \u201cPoliclinico\u201d, PO \u201cSan Marco\u201d, University of Catania, 95100 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6598-9903","authenticated-orcid":false,"given":"Silvia","family":"Marino","sequence":"additional","affiliation":[{"name":"Unit of Pediatrics and Pediatric Emergency, AOU \u201cPoliclinico\u201d, PO \u201cSan Marco\u201d, University of Catania, 95100 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,5,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1016\/j.cell.2015.06.056","article-title":"Beta-neurexins control neural circuits by regulating synaptic endocannabinoid signaling","volume":"162","author":"Anderson","year":"2015","journal-title":"Cell"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1100","DOI":"10.1073\/pnas.96.3.1100","article-title":"Neuroligin 1 is a postsynaptic cell-adhesion molecule of excitatory synapses","volume":"96","author":"Song","year":"1999","journal-title":"Proc. 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