[The Specialties Hospital of the 21st Century National Medical Center: 60 trailblazing years in Mexican medicine].

The objective of this letter to the editor is to make a reflection about the past, present and future of the Specialties Hospital "Dr. Bernardo Sepúlveda Gutiérrez" from the 21st Century National Medical Center, on the occasion of its 60th anniversary.

[Answer to "Comment on article: "Correlation between ultrasonography and thorax portable radiography in patients with COVID-19""].

Science, through scientific research, is an activity that generates new ideas. However, for the construction of new knowledge it is necessary to confront ideas with peers in the scientific world; which is exercised through scientific communication.

[Correlation between ultrasonography and thorax portable radiography in patients with COVID-19].

Background: During the COVID-19 pandemic, portable chest radiography (portable CRx) and lung ultrasonography (LUS) have been widely used to follow up hospitalized patients. Yet, it is scarce the information about the relation between the signs observed by means of each method in patients with COVID-19.

Objective: To assess the correlation between concurrent images acquired by LUS and portable CRx during the follow-up of hospitalized patients with COVID-19.

Burnout, depersonalization, and anxiety contribute to post-traumatic stress in frontline health workers at COVID-19 patient care, a follow-up study.

Introduction: We designed a follow-up study of frontline health workers at COVID-19 patient care, within the same working conditions, to assess the influence of their general characteristics and pre-existing anxiety/depression/dissociative symptoms and resilience on the development of symptoms of post-traumatic stress disorder (PTSD), while monitoring their quality of sleep, depersonalization/derealization symptoms, acute stress, state anxiety, and burnout.

Methods: In a Hospital reconfigured to address the surge of patients with COVID-19, 204 frontline health workers accepted to participate. They completed validated questionnaires to assess mental health: before, during, and after the peak of inpatient admissions.

[Elastography in the evaluation of thyroid nodules].

Background: Thyroid nodules are a very common pathology in clinical practice and in imaging studies. Autopsy results indicate a 50% prevalence of thyroid nodules greater than 1 cm in patients with no clinical symptomatology. The goal is to evaluate the accuracy of elastography in the evaluation of thyroid nodules with suspicion of malignancy by comparing the results obtained in qualitative and semi-quantitative elastography with the cytopathological study obtained by BAAF of thyroid nodules and The TI-RADS system.

[Assessment of pulmonary complications in renal transplantation through the use of radiography].

Background: Lower respiratory tract infections are the most common complications in kidney transplant patients in the first six months and they are associated with high mortality. Other complications include pulmonary edema, pulmonary embolism, and pulmonary hemorrhage. The aim of this study was to evaluate pulmonary complications in kidney transplant patients by using chest radiography.

Carotid intima-media thickness in pediatric type 1 diabetic patients.

Objective: To compare the carotid artery intima-media thickness in Hispanic pediatric type 1 diabetic patients against that in healthy control subjects matched for age, sex, height, and BMI.

Research Design And Methods: The evaluation consisted of anthropometric measurements, biochemical parameters, and a carotid Doppler and real-time ultrasound, in which carotid artery intima-media thickness (cIMT), peak systolic velocity, and end diastolic velocity were measured using standardized procedures.

Results: A total of 52 diabetic patients and 47 control subjects were included.