This study assesses a possible cardiac dysfunction in individuals with Cornelia de Lange syndrome (CdLS) without diagnosed congenital heart disease (CHD) and its association with other factors. Twenty patients and 20 controls were included in the study divided into three age-dependent groups (A: < 10 yrs, B: 10–20 yrs, C: > 20 yrs), and were evaluated using conventional echocardiography, tissue doppler imaging (TDI), two-dimensional speckle tracking and genetic and biochemical analyses. The left ventricular global longitudinal strain (GLS) was altered (< 15.9%) in 55% of patients, being pathological in the older group (A: 19.7 ± 6.6; B: -17.2 ± 4.7; C: -13.6 ± 2.9). The speckle tracking technique revealed a downward trend in the values of strain, strain rate and velocity, especially in the oldest group. Likewise, the ejection fraction (LVEF) and shortening fraction (LVFS) values, although preserved, also showed a decreased with age (p < 0.05). The analytical markers of cardiovascular risk and cardiac function showed no alterations. The molecular analyses revealed 16 individuals carrying pathogenic variants in NIPBL, two with variants in SMC1A, one with a variant in RAD21 and one with a HDAC8 variant. This is the first systematic approach that demonstrates that individuals with CdLS may present early cardiomyopathy, which can be detected by speckle tracking technique even before the appearance of clinical symptoms and the alteration of other echocardiographic or analytical parameters. For all these reasons, cardiological followup is suggested even in the absence of CHD, especially from adolescence onwards.

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Presentación de casos clínicos RESUMENEl tabique vaginal transverso es una anomalía que se originaría por un fracaso en la fusión y/o canalización del seno urogenital y de los conductos müllerianos con baja frecuencia, pero con un importante impacto en la salud de las pacientes que lo presentan. El tratamiento es quirúrgico y la vía de abordaje depende de la localización y del espesor del tabique. En ocasiones, se ha relacionado con una herencia que podría ser recesiva asociada al sexo, pero se han documentado pocos casos de asociación familiar. Se exponen los casos de dos hermanas que presentaron esta rara entidad con 5 años de diferencia y que se diagnosticaron por la aparición de dolor abdominal hipogástrico intenso a la edad de 11 y 12 años, cuando presentaban un desarrollo puberal estadio III de Tanner y amenorrea primaria. Palabras clave: tabique vaginal transverso, anomalías de conductos de Müller, herencia, hematocolpos, dolor abdominal. ABSTRACTTransverse vaginal septum is a disorder that would arise from a failure in the fusion and/or channeling of the urogenital sinus and the müllerian ducts with low frequency but with a significant impact on the health of patients. The treatment is surgical and it will depend on the location and thickness of the septum. Sometimes, it described a female sex-limited autosomal recessive transmission but few cases of family association have been reported. We present the cases of two sisters who had this rare entity 5 years apart and were diagnosed by the presentation of an intense hypogastric abdominal pain at the age of 11 and 12 years when they had a Tanner stage III pubertal development and primary amenorrhea.