title: Delineation of the clinically recognizable 17q22 contiguous gene deletion syndrome in a patient carrying the smallest microdeletion known to date.
abstract: We describe a patient with a 1.34 Mb microdeletion at chromosome band 17q22, which is also present in his affected mother. To better delineate this microdeletion syndrome, we compare the clinical and molecular characteristics of 10 previously reported cases and our patient. Of these, the present patient has the smallest deletion which includes five genes: MMD, TMEM100, PCTP, ANKFN1, and NOG. We compare the clinical manifestations described in relation to NOG, since this is the only gene whose loss is shared by our patient and the other eight patients. Previously, the clinical patterns associated with NOG mutations have been included under the general term "NOG-related symphalangism spectrum disorder (NOG-SSD)." Based on our analyses, and considering that there is a clinical correlation observed in cases with a "17q22 microdeletion including NOG" of which the main characteristics can be contributed to loss of this gene, we propose that the clinical patterns observed in these patients should be named as NOG-spectrum disorder-contiguous gene syndrome (NOGSD-CGS). This designation is important for clinicians because when a patient has defects concordant with alterations of NOG but also presents other anomalies not related to this gene, they would be able to suspect the existence of a microdeletion affecting 17q22, therefore, allowing an early diagnosis. This will also enable the clinician to provide the family with adequate information about the prognosis and the risk of reoccurrence in future potential offspring.
authors.affiliation: Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.|Centro de Investigación sobre Anomalías Congénitas (CIAC), Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Martínez-Fernández
authors.affiliation: Departamento de Genética, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain.
authors.forename: Joaquin
authors.initials: J
authors.lastname: Fernández-Toral
authors.affiliation: Servicio de Genética, Biocruces Health Research Institute, Hospital Universitario Cruces, Barakaldo, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Llano-Rivas
authors.affiliation: Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.|Centro de Investigación sobre Anomalías Congénitas (CIAC), Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.|Instituto de Investigación de Enfermedades Raras, Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Bermejo-Sánchez
authors.affiliation: Centro de Investigación sobre Anomalías Congénitas (CIAC), Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.
authors.forename: Alexandra
authors.initials: A
authors.lastname: MacDonald
authors.affiliation: Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.|Centro de Investigación sobre Anomalías Congénitas (CIAC), Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC), Instituto de Salud Carlos III, Ministerio de Economía y Competitividad, Madrid, Spain.|Dpto. Farmacología, Facultad de Medicina, Universidad Complutense, Madrid, Spain.
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Martínez-Frías
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D000293:Adolescent; D002872:Chromosome Deletion; D002886:Chromosomes, Human, Pair 17 / Q000235:genetics*; D005260:Female; D017353:Gene Deletion; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D013577:Syndrome
keywords: 17q22; 17q22 contiguous gene syndrome; NOG gene; NOGSD-CGS; microdeletion