2021, Number 2
Cytogenetic diagnosis in a patient affected by intellectual disability in Portuguesa State, Venezuela
Language: Spanish
References: 12
Page: 1-8
PDF size: 274.21 Kb.
ABSTRACT
Introduction: chromosomal alterations both in number and structure are an important cause of morbidity and mortality. They affect approximately one out of every two-hundred live newborns, being the main cause of intellectual disability.Objective: to describe the cytogenetic diagnosis in a patient affected with intellectual disability.
Case report: a 6-year-old child who was taken for genetic counseling due to intellectual disability, dysmorphias and short small height. Genetic clinical history was taken; clinical method and cytogenetic diagnosis were applied; GTG chromosome banding was applied and 25 metaphases were analyzed. A structural chromosomal aberration (complex translocation) was diagnosed in 25 metaphases studied, showing the presence of four (4) autosomal chromosomes involved and the breakpoints: 46,XX, t(7;10;14;18)(p22;q11.1;q31;q11.1).
Conclusions: the study made possible to provide a diagnosis, define the risk of recurrence in the offspring and improve treatment, supporting the importance of genetic counseling which is a significant tool at primary health care level.
REFERENCES
Armas García LE, Gómez Valencia L, García Días AD, Cortes Viayra AC, Leal Soriano K, Salas García R. Análisis retrospectivo de anomalías cromosómicas de tipo numéricas en pacientes del Hospital Regional de Alta Especialidad del Niño “Dr. Rodolfo Nieto Padrón (2005-2015). Rev Salud Pública y Nutrición. [Internet] 2016 oct- dic [Citado 15/09/2019]; 15(4): [Aprox. 8 p.]. Disponible en: Disponible en: https://www.medigraphic.com/pdfs/revsalpubnut/spn-2016/spn164a.pdf
Quiñones OL, Quintana J, Mendez LA, Barrios A, Suarez U, García M, Del Sol M. Frecuencias de reordenamientos cromosómicos estructurales acorde a las indicaciones para estudios citogenéticos prenatales y postnatales. Rev Cubana Genét Comunit. [Internet] 2010 [Citado 15/09/2019]; 4(3): [Aprox. 7 p.]. Disponible en: Disponible en: http://bvs.sld.cu/revistas/rcgc/v4n3/rcgc060310.pdf
Luna-Barrón B, Taboada-López G, Siacar-Bacarreza S, Lafuente-Álvarez E, Rada-Tarifa A, Darinka Contreras-Castro T, et al. Trisomía 9: reporte de un caso. Revista Cuadernos. [Internet] 2019 [Citado 15/09/2019]; 60(1): [Aprox. 4 p.]. Disponible en: Disponible en: http://www.scielo.org.bo/pdf/chc/v60n1/v60n1_a06.pdf
Contreras-Castro DT, Luna-Barrón B, Taboada-López G, Tarifa AR, Lafuente Álvarez E. Frecuencia de aberraciones cromosómicas en pacientes del Instituto de Genética -UMSA período 2011- 2015. Cuad. Hosp. Clín. 2017 [Citado 15/09/2019]; 58(2): 14-19. https://pesquisa.bvsalud.org/portal/resource/pt/biblio-972853
Mora AP, Paredes D, Rodríguez O, Quispe E, Chavesta F, Klein de Zihelboim E, et al. Anomalías cromosómicas en abortos espontáneos. Rev peru. ginecol. obstet. [Internet] 2016 [Citado 15/09/2019]; 62(2): [Aprox. 11 p.]. Disponible en: Disponible en: https://pesquisa.bvsalud.org/portal/resource/pt/biblio-1043227