Overall manifestations and survival of pediatric patients with Langerhans cell histiocytosis. A middle-income country (mic) national multicenter study.

Background: Langerhans cell histiocytosis (LCH) is a rare neoplastic disease characterized by clonal proliferation of den-dritic cells. It is Mexico's ninth most frequent malignancy in patients under 18 years of age. The aim of the study was to determine the clinical characteristics, treatment, and survival of Mexican pediatric patients diagnosed with LCH treated from January 2010 to December 2018.

Characteristics of Hepatocellular Carcinoma by Sex in Mexico: A Multi-Institutional Collaboration.

Liver cancer is the fourth leading cause of cancer-related death worldwide. In Mexico, there is a high burden of liver cancer mortality in rural states, affecting both women and men equally. Thus, we aimed to describe the demographic and clinical characteristics of hepatocellular cancer (HCC) by sex in Mexico.

SARS-CoV-2 immune response and reinfection in vaccinated Maya and mestizo in Southeast of Mexico.

Immune response to pathogens, including coronaviruses, is influenced by HLA haplotypes. 1,2. Maya ethnic group is predominant in Yucatan peninsula, this Amerindian group present allele frequency  HLA-G*01:01:02, HLA-G*01:01:01, HLA-G*01:04:01, HLA-A*68  not found in another Amerindians.

Impact of hospital characteristics on implementation of a Pediatric Early Warning System in resource-limited cancer hospitals.

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.

Unusual co-infection of severe malaria by Plasmodium vivax and dengue virus in Mexico.

Malaria and dengue fever are among the most common mosquito-borne diseases worldwide; however, reports of coinfection are rare. We present a case of severe malaria and dengue coinfection in a 16-yearold female patient presenting with fever, thrombocytopenia, pleural effusion, myopericarditis, and acute respiratory distress syndrome. Dengue infection was confirmed by the presence of immunoglobin M antibodies and nonstructural protein 1, while malaria was confirmed by the presence of Plasmodium vivax in thick and thin blood smears.

[Correlation between Predictive Index of Difficult Intubation and Cormack].

Background: More than 600 people die each year in developed countries from complications at the time of orotracheal intubation. Studies have shown that all predictors used so far have low ability to predict difficult airway. When analyzing this ability, both clinical suspicion, indirect laryngoscopy and even the different individual examinations showed predictive values higher than 80%.

Can the genetic variability of Blastocystis sp. be associated with the climatic region of its human carriers?

Blastocystis sp. is a widespread microorganism that colonizes the intestinal tract of several animals, including human beings, while its pathogenic role in humans is still under debate. The objective of the present study was to describe the frequency of Blastocystis sp.

Toward a machine learning model for a primary diagnosis of Guillain-Barré syndrome subtypes.

Guillain-Barré Syndrome (GBS) is a neurological disorder affecting people of any age and sex, mainly damaging the peripheral nervous system. GBS is divided into several subtypes, in which only four are the most common, demanding different treatments. Identifying the subtype is an expensive and time-consuming task.

"Healthcare Kamikazes" during the COVID-19 Pandemic: Purpose in Life and Moral Courage as Mediators of Psychopathology.

Although the required personal protective equipment was not available during the first wave of the COVID-19 pandemic, Spanish healthcare workers continued to work, being dubbed as 'healthcare kamikazes'. Two possible reasons are moral courage and purpose in life that, in turn, would modulate the appearance of psychopathology. Cross-sectional study was carried out in 90 Spanish and 59 Mexican healthcare professionals, and 56 medical and nursing students.

Clinical and organizational risk factors for mortality during deterioration events among pediatric oncology patients in Latin America: A multicenter prospective cohort.

Background: Hospitalized pediatric hematology-oncology (PHO) patients have frequent clinical deterioration events (CDE) requiring intensive care unit (ICU) admission, particularly in resource-limited settings. The objective of this study was to describe CDEs in hospitalized PHO patients in Latin America and to identify event-level and center-level risk factors for mortality.

Methods: In 2017, the authors implemented a prospective registry of CDEs, defined as unplanned transfers to a higher level of care, use of ICU-level interventions on the floor, or nonpalliative floor deaths, in 16 PHO centers in 10 countries.

The genus Rickettsia in Mexico: Current knowledge and perspectives.

The genus Rickettsia encompasses 35 valid species of intracellular, coccobacilli bacteria that can infect several eukaryotic taxa, causing multiple emerging and re-emerging diseases worldwide. This work aimed to gather and summarise the current knowledge about the genus Rickettsia in Mexico, updating the taxonomy of the bacteria and their hosts by including all the records available until 2020, to elucidate host-parasite relationships and determine the geographical distribution of each Rickettsia species present in the country. Until now, 14 species of Rickettsia belonging to four groups have been recorded in Mexico.

Prevalence of inhibitors and clinical characteristics in patients with haemophilia in a middle-income Latin American country.

Introduction: Development of inhibitors is the most serious complication in patients with haemophilia (PWH). The prevalence of inhibitors in patients with severe haemophilia A (HA) is approximately 25%-30%. Inhibitor prevalence differs among populations.

[Troponin I, creatine-phosphokinase and creatine-phosphokinase-MB in newborns with suspected neonatal asphyxia].

Background: The cardiac troponin I (cTnI), creatine phospokinase (CPK), and creatine kinase- myocardial band (CK-MB) are cardiac biomarkers used in newborns with asphyxia.

Objective: To analyze the relationship between cTnI, CPK and CPK-MB levels with clinical and biochemical diagnostic criteria for neonatal asphyxia.

Methods: Analytical cross-sectional study in neonates with at least one diagnostic criterion of asphyxia.

Antitubercular Activity of the Fungus sp. MR41 Strain.

Tuberculosis (TB) is a leading cause of death worldwide from infectious diseases and its inadequate treatment has led to emergence of resistant strains. The emergence of these strains renders the search for new drugs for the treatment of TB. The aim of this study was the evaluation of the anti-TB activity of the extract from fungus sp.

[Prevalence of dengue and leptospira in febrile patients of the general hospital of specialities in Mexico].

Among the infectious diseases characterized by a febrile picture are: dengue, leptospirosis, rickettsiosis and salmonellosis, among others. The objective of this study was to identify IgM antibodies against dengue and Leptospira in febrile patientes. The seropositivity for IgM antibodies to dengue was 34%; 26.

Omitted Stimulus Potential Depends on the Sensory Modality.

Determining the characteristics of Omitted Stimulus Potential (OSP) parameters using different sensory modalities is important because they reflect timing processes and have a substantial influence on time perception. At the same time, the central mechanisms of time perception associated with sensory processing can modulate cortical brain waves related to cognition. This experiment tested the relationship between parameters of the whole OSP brain wave when trains of auditory, visual or somatosensory stimuli were applied.

[Diffuse cutaneous leishmaniasis (DCL) and visceral leishmaniasis (VL) concurrent with cancer: Presentation of a case].

Male of 52 year old with chronic alcoholism and ulcerated lesion on the face and disseminated nodular skin lesions, underwent to biopsy of ulcer edges where was observed a concomitant epidermoid malignancy with Leishmania (L.). Besides others, biopsies of nodule in the periumbilical region, lymph node and bone marrow were assayed, and all biopsies had abundant amastigotes.

The Relationship between Parameters of Long-Latency Evoked Potentials in a Multisensory Design.

In previous papers, we have shown that parameters of the omitted stimulus potential (OSP), which occurs at the end of a train of sensory stimuli, strongly depend on the modality. A train of stimuli also produces long-latency evoked potentials (LLEP) at the beginning of the train. This study is an extension of the OSP research, and it tested the relationship between parameters (ie, rate of rise, amplitude, and peak latency) of the P2 waves when trains of auditory, visual, or somatosensory stimuli were applied.

[P200 parameters in patients with diabetes mellitus type 2 (DM2)].

Introduction: A complication underserved in diabetic patients is the cognitive deficits that can reach dementia. Studying the association between electrophysiological, neuropsychological, and biochemical measures could provide a breakthrough in the understanding of this phenomenon.

Objectives: To compare P200 parameters between subjects with and without diabetes mellitus type 2 and to determine their relationship with biochemical and neuropsychological indicators.

Low seroprevalence of Trypanosoma cruzi infection and chronic chagasic cardiomyopathy in a region with abundance of triatomine vectors in Yucatan Peninsula of Mexico.

The Yucatan Peninsula of Mexico is endemic with Chagas disease. The main vector responsible for Trypanosoma cruzi transmission is Triatoma dimidiata which is abundant in domestic, peridomestic and sylvan cycles. The abundance of vectors favours T.

Feature selection for better identification of subtypes of Guillain-Barré syndrome.

Guillain-Barré syndrome (GBS) is a neurological disorder which has not been explored using clustering algorithms. Clustering algorithms perform more efficiently when they work only with relevant features. In this work, we applied correlation-based feature selection (CFS), chi-squared, information gain, symmetrical uncertainty, and consistency filter methods to select the most relevant features from a 156-feature real dataset.

Family history and socioeconomic risk factors for non-syndromic cleft lip and palate: a matched case-control study in a less developed country.

Introduction: From an epidemiological point of view, non-syndromic orofacial clefts are the most common oral congenital deformities worldwide.

Objective: Family histories were traced and socioeconomic risk factors were identified for non-syndromic cleft lip with or without cleft palate.

Material And Methods: A case-control study was carried out with 208 cases of non-syndromic cleft lip with or without cleft palate, and matched by age and sex with 416 controls.

[Endurance training in adults with diabetes mellitus type 2].

Objectives: Test the effects of an endurance training exercise on glycosylated hemoglobin (HbA1c) levels, muscle strength and perceived muscle strength. Explore the influence of diet, exercise, medication and manifestations of hypo or hyperglycemia in the blood glucose control of adults with diabetes mellitus type 2, who attended endocrinology clinics at two public hospitals in Monterrey, Mexico.

Basic Procedures: A 12-week non equivalent control group design was used.