RESUMEN
BACKGROUND: The del22q11 syndrome patients present immunological abnormalities associated to thymus alterations. Up to 75% of them present cardiopathies and thymus is frequently removed during surgery. The thymectomy per se has a deleterious effect concerning lymphocyte subpopulations, and T cell function. When compared to healthy controls, these patients have higher infections propensity of variable severity. The factors behind these variations are unknown. We compared immunological profiles of del22q11.2 Syndrome patients with and without thymectomy to establish its effect in the immune profile. METHODS: Forty-six del22q11.2 syndrome patients from 1 to 16 years old, 19 of them with partial or total thymectomy were included. Heart disease type, heart surgery, infections events and thymus resection were identified. Immunoglobulin levels, flow cytometry for lymphocytes subpopulations and TREC levels were determined, and statistical analyses were performed. RESULTS: The thymectomy group had a lower lymphocyte index, both regarding total cell count and when comparing age-adjusted Z scores. Also, CD3+, CD4+ and CD8+ lower levels were observed in this group, the lowest count in those patients who had undergone thymus resection during the first year of life. Their TREC level median was 23.6/µL vs 16.1µL in the non-thymus group (p=0.22). No differences were identified regarding immunoglobulin levels or infection events frequencies over the previous year. CONCLUSION: Patients with del22q11.2 syndrome subjected to thymus resection present lower lymphocyte and TREC indexes when compared to patients without thymectomy. This situation may be influenced by the age at the surgery and the time elapsed since the procedure.
Asunto(s)
Subgrupos de Linfocitos T/fisiología , Linfocitos T/fisiología , Timectomía , Timo/cirugía , Adolescente , Niño , Preescolar , Deleción Cromosómica , Cromosomas Humanos Par 22/inmunología , Femenino , Citometría de Flujo , Humanos , Lactante , Recuento de Linfocitos , Masculino , Receptores de Antígenos de Linfocitos T/genéticaAsunto(s)
Displasia Ectodermal Anhidrótica Tipo 1/genética , Ectodisplasinas/genética , Receptor Edar/genética , Mutación , Niño , Preescolar , Femenino , Humanos , Lactante , Masculino , México , Linaje , Fenotipo , Adulto JovenRESUMEN
The Meier-Gorlin syndrome (MGS) or ear, patella, short stature syndrome (MIM #224690) is a rare disorder with bilateral microtia, aplasia or hypoplasia of the patellae and severe intra-uterine and post-natal growth retardation. We report the case of a 10-year-old male with MGS diagnosis, his parents were related, he also showed conductive hearing loss and maloclussion and long upper central incisors, more importantly he had asymmetry of the left cerebral hemisphere and ventricular system, his intelligence was normal. As far as we know, these abnormalities have not been previously described in patients with MGS and the present report corresponds to the first Mexican case described so far.
Asunto(s)
Anomalías Múltiples/patología , Ventrículos Cerebrales/anomalías , Oído/anomalías , Trastornos del Crecimiento/patología , Micrognatismo/patología , Rótula/anomalías , Anomalías Múltiples/genética , Anomalías Múltiples/fisiopatología , Niño , Microtia Congénita , Consanguinidad , Oído/patología , Oído/fisiopatología , Trastornos del Crecimiento/genética , Trastornos del Crecimiento/fisiopatología , Humanos , Masculino , México , Micrognatismo/genética , Micrognatismo/fisiopatología , Rótula/patología , Rótula/fisiopatologíaRESUMEN
Chromosomal abnormalities that result in genomic imbalances are a major cause of congenital and developmental anomalies. Partial duplication of chromosome 3q syndrome is a well-described condition, and the phenotypic manifestations include a characteristic facies, microcephaly, hirsutism, synophrys, broad nasal bridge, congenital heart disease, genitourinary disorders, and mental retardation. Approximately 60%-75% of cases are derived from a balanced translocation. We describe a family with a pure typical partial trisomy 3q syndrome derived from a maternal balanced translocation t(3;13)(q26.2;p11.2). As the chromosomal rearrangement involves the short arm of an acrocentric chromosome, the phenotype corresponds to a pure trisomy 3q26.2-qter syndrome. There are 4 affected individuals and several carriers among three generations. The report of this family is relevant because there are few cases of pure duplication 3q syndrome reported, and the cases described here contribute to define the phenotype associated with the syndrome. Furthermore, we confirmed that the survival until adulthood is possible. This report also identified the presence of glycosaminoglycans in urine in this family, not related to the chromosomal abnormality or the phenotype.