1,447 results match your criteria: "Hospital de Especialidades Del Centro Medico Nacional "Siglo XXI"[Affiliation]"

[Factors associated with functionality in patients with closed ankle fracture].

Rev Med Inst Mex Seguro Soc

May 2023

Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Coordinación de Investigación en Salud. Ciudad de México, México.

Background: Ankle fractures are among the most frequent fractures in the lower limb, predominantly affecting young people and representing approximately 9% of all fractures.

Objective: To identify the factors associated with functionality in patients with closed ankle fracture.

Material And Methods: Observational and retrospective study.

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Dieulafoy's lesion of the rectum: A case report.

Rev Gastroenterol Mex (Engl Ed)

November 2023

Departamento de Endoscopia Gastrointestinal, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico.

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Background: Pediatric Early Warning Systems (PEWS) aid in identification of deterioration in hospitalized children with cancer but are underutilized in resource-limited settings. Proyecto EVAT is a multicenter quality improvement (QI) collaborative in Latin America to implement PEWS. This study investigates the relationship between hospital characteristics and time required for PEWS implementation.

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Article Synopsis
  • Acute hemorrhagic leukoencephalitis (AHLE) is a severe brain inflammation leading to rapid demyelination and high mortality, often initiated by viral infections and immune responses.
  • A clinical case is presented involving a young woman who developed AHLE after a respiratory infection, resulting in severe neurological impairment despite intensive treatment.
  • The conclusion highlights the need for more research on AHLE to improve understanding of its clinical course and treatment options, as current evidence is limited.
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[Acute cholangitis secondary to periampullary duodenal diverticulum. Case report].

Rev Med Inst Mex Seguro Soc

March 2023

Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Hospital de Especialidades "Dr. Bernardo Sepúlveda Gutiérrez", Servicio de Gastrocirugía. Ciudad de México, México.

Background: Periampullary duodenal diverticula are rare and pancreaticobiliary complications infrequent, however, when they are diagnosed and associated with symptoms, they warrant urgent intervention. The aim of this article is to present a clinical case of severe cholangitis secondary to the presence of a periampullary diverticulum successfully treated endoscopically.

Clinical Case: A 68-year-old man with a history of diabetes and hypertension, was admitted to the emergency room with symptoms of abdominal pain, fever, and tachycardia.

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Background: Neuromyelitis optica spectrum (NMO) is an autoimmune condition with preferential target at the optic nerves and spinal cord. Although HIV infection can also cause neuritis and myelitis, the entity of HIV related to NMO has recently been elucidated, however, little is known about the context of this disease. Objective: To describe the clinical characteristics, imaging, treatment, and functional prognosis in an HIV-positive patient who developed an episode of longitudinally extensive transverse myelitis (LETM) with positive anti-AQP4 antibodies.

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naturally infected calves present a higher bacterial load and proinflammatory response than adult cattle.

Front Vet Sci

April 2023

Laboratorio de Investigación en Tuberculosis y Brucelosis, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico City, Mexico.

Granulomas are characteristic bovine tuberculosis lesions; studying this structure has improved our understanding of tuberculosis pathogenesis. However, the immune response that develops in granulomas of young cattle naturally infected with () has not been fully studied. Our previous work described an atypical pattern in granulomatous lesions of cattle younger than 4 months (calves) naturally infected previously that did not correspond to the histological classification previously proposed.

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Interim safety and immunogenicity results from an NDV-based COVID-19 vaccine phase I trial in Mexico.

NPJ Vaccines

May 2023

Laboratorio Avi-Mex, S. A. de C. V. (Avimex), Maíz 18, Granjas Esmeralda, CP 09810, Iztapalapa, CDMX, Mexico.

There is still a need for safe, efficient, and low-cost coronavirus disease 2019 (COVID-19) vaccines that can stop transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Here we evaluated a vaccine candidate based on a live recombinant Newcastle disease virus (NDV) that expresses a stable version of the spike protein in infected cells as well as on the surface of the viral particle (AVX/COVID-12-HEXAPRO, also known as NDV-HXP-S). This vaccine candidate can be grown in embryonated eggs at a low cost, similar to influenza virus vaccines, and it can also be administered intranasally, potentially to induce mucosal immunity.

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Background: Pityriasis lichenoides et varioliformis acuta (PLEVA) is a rare dermatosis recognized as a benign condition of unknown etiopathogenesis. It is more common in pediatric patients and young adults and is characterized by multiple small or large erythematous plaques spread over the trunk and extremities.

Case Report: We describe the case of a 5-year-old male, previously healthy, with multiple erythematous lesions that disappeared leaving hypopigmented macules.

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Current vision on diagnosis and comprehensive care in hepatic encephalopathy.

Rev Gastroenterol Mex (Engl Ed)

July 2023

Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.

The first clinical guidelines on hepatic encephalopathy were published in 2009. Almost 14 years since that first publication, numerous advances in the field of diagnosis, treatment, and special condition care have been made. Therefore, as an initiative of the Asociación Mexicana de Gastroenterología A.

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Introduction: Increased triglycerides (TGs) are a major risk factor for cardiovascular disease. Furthermore, hypertriglyceridemia is commonly associated with a reduction of high-density lipoprotein cholesterol (HDL-C) and an increase in atherogenic small-dense low-density lipoprotein (LDL-C) levels. Studies provide support that polyunsaturated omega-3 fatty acids (ω3-LCPUFAs) are cardioprotective and have antithrombotic and anti-inflammatory effects.

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Oxidative stress (OS) plays an essential role in the pathophysiology of Duchenne muscular dystrophy (DMD). However, the actors that regulate OS need to be better studied. We aimed to evaluate whether NFE2-like bZIP transcription factor 2 (Nrf2), glutathione, malondialdehyde (MDA), and protein carbonyl concentrations change according to the disease severity in DMD patients.

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Background: One of the most serious complications of cholecystectomy is bile duct disruption, which can be associated with concomitant vascular injury in up to 3.4%. The incidence, demographic characteristics and treatment are underreported worldwide.

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Type 2 diabetes (T2D) is a heterogeneous disease that develops through diverse pathophysiological processes. To characterise the genetic contribution to these processes across ancestry groups, we aggregate genome-wide association study (GWAS) data from 2,535,601 individuals (39.7% non-European ancestry), including 428,452 T2D cases.

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Article Synopsis
  • EBV and H. pylori are major risk factors for gastric cancer, both causing lifelong infections and being carcinogenic to humans.
  • CagA positive strains of H. pylori trigger the secretion of IL-8 in gastric cells, promoting chronic inflammation by attracting neutrophils.
  • The study found that IL-8 also acts as a strong chemoattractant for EBV-infected B lymphocytes, with CXCR2 being the key receptor influenced by EBV, suggesting a possible interaction mechanism between H. pylori and EBV in gastric tissue.
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Chronic Comorbidities in Middle Aged Patients Contribute to Ineffective Emergency Hematopoiesis in Covid-19 Fatal Outcomes.

Arch Med Res

April 2023

Centro de Investigación Biomédica de Oriente, Delegación Puebla, Instituto Mexicano del Seguro Social, Puebla, México; Unidad de Educación e Investigación, Instituto Mexicano del Seguro Social, Ciudad de México, México. Electronic address:

Article Synopsis
  • Mexico experienced high COVID-19 mortality rates, particularly in adults under 65, with over half of reported deaths occurring in this age group, potentially due to demographics and metabolic diseases.
  • A study of 245 hospitalized COVID-19 patients revealed a case fatality rate (CFR) of 35.51%, with significant mortality linked to pre-existing conditions like chronic kidney disease and diabetes.
  • The research suggested that an imbalance in immune response and specific inflammatory markers at day 7 post-admission could help identify individuals at high risk for severe outcomes, proposing a predictive tool for early intervention in vulnerable populations.
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Background: Fatigue is a common symptom in hypothyroidism; however, the effect of levothyroxine on fatigue has been little studied. The aim of this study was to evaluate the effect of levothyroxine on fatigue in Latino patients with primary hypothyroidism, as well as the association of TSH and free T4 (FT4) with the severity and persistence of fatigue.

Methods: A prospective study was performed in 92 patients with primary hypothyroidism.

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The Dengue (DENV), Zika (ZIKV), and Chikungunya (CHIKV) virus infections have been linked to Guillain-Barré syndrome (GBS). GBS has an estimated lethality of 4% to 8%, even with effective treatment. Mexico is considered a hyperendemic country for DENV due to the circulation of four serotypes, and the ZIKV and CHIKV viruses have also been circulating in the country.

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Background: hypovitaminosis D is frequent in kidney transplant recipient (KTR) patients and is associated with deleterious effects both at the bone and extraosseous levels. Treatment with cholecalciferol is effective for the normalization of 25(OH)D, demonstrating a beneficial effect on the calcium-tropic axis in other populations; however, its effect on the PTH/vitamin D/calcium and FGF23/klotho/phosphorus axis in RTR has not been reported. The aim of this study was to evaluate the effect of normalization of serum 25(OH)D concentrations on the PTH/vitamin D/calcium-FGF23/klotho/phosphorus axis in KTR treated with cholecalciferol, as well as the association between the components of this axis.

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[Scientific evidence of the consequences of modernity].

Gac Med Mex

December 2022

Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades "Dr. Bernardo Sepúlveda", Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social. Ciudad de México, México.

The prevalence of type 2 diabetes (T2D) in Mexico is 14.4%. This disease is characterized by a state of hyperglycemia and chronic inflammation secondary to inadequate insulin secretion and its resistance.

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Acral melanoma (AM) is the most common melanoma in non-Caucasian populations, yet it remains largely understudied. As AM lacks the UV-radiation mutational signatures that characterize other cutaneous melanomas, it is considered devoid of immunogenicity and is rarely included in clinical trials assessing novel immunotherapeutic regimes aiming to recover the antitumor function of immune cells. We studied a Mexican cohort of melanoma patients from the Mexican Institute of Social Security (IMSS) (n = 38) and found an overrepresentation of AM (73.

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LPS Triggers Acute Neuroinflammation and Parkinsonism Involving NLRP3 Inflammasome Pathway and Mitochondrial CI Dysfunction in the Rat.

Int J Mol Sci

February 2023

Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City 07360, Mexico.

Whether neuroinflammation leads to dopaminergic nigrostriatal system neurodegeneration is controversial. We addressed this issue by inducing acute neuroinflammation in the substantia nigra (SN) with a single local administration (5 µg/2 µL saline solution) of lipopolysaccharide (LPS). Neuroinflammatory variables were assessed from 48 h to 30 days after the injury by immunostaining for activated microglia (Iba-1 +), neurotoxic A1 astrocytes (C3 + and GFAP +), and active caspase-1.

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Physicians' Distress Related to Moral Issues and Mental Health In-Between Two Late Waves of COVID-19 Contagions.

Int J Environ Res Public Health

February 2023

Unidad de Investigación Médica en Otoneurología, Instituto Mexicano del Seguro Social, Ciudad de México 06720, Mexico.

In addition to the sanitary constrains implemented due to the pandemic, frontline physicians have faced increased workloads with insufficient resources, and the responsibility to make extraordinary clinical decisions. In 108 physicians who were at the forefront of care of patients with COVID-19 during the first two years of the pandemic, mental health, moral distress, and moral injury were assessed twice, in between two late waves of COVID-19 contagions, according to their adverse psychological reactions, in-hospital experience, sick leave due to COVID-19, quality of sleep, moral sensitivity, clinical empathy, resilience, and sense of coherence. Three months after the wave of contagions, the adverse emotional reactions and moral distress decreased, while moral injury persisted.

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Objective: To analyze, in a cohort of acromegalic patients, the results of the efficiency and safety of radiosurgery (CyberKnife), as well as the prognostic factors associated with disease remission.

Material And Methods: Observational, retrospective, longitudinal, and analytical study that included acromegalic patients with persistent biochemical activity after initial medical-surgical treatment, who received treatment with CyberKnife radiosurgery. GH and IGF-1 levels at baseline after one year and at the end of follow-up were evaluated.

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The middle fossa, cavernous sinus, and paraclival triangles consist of ten triangles. Their use in a surgical approach is vast; most are used as landmarks to access and identify other structures of surgical interest. Multiple labels, borders, and contents mentioned by different authors make understanding and reproduction challenging and confusing.

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