Global COVID-19 Pandemic Outcomes: A Cross-Country Comparison Study of Policy Strategies.

This paper explores global COVID-19 treatment and containment strategies in 108 countries worldwide, specifically the correlation between COVID-19 deaths and the countries' vaccination rates. Comparison of data across states, provinces, territories, and countries relied upon a common method to evaluate data regarding the impact of COVID-19 policies in the last three years. Data from nine different databases were analyzed to determine if there were correlations between the percentage of countrywide COVID-19 deaths/population and countries' percent vaccinated.

Co-occurrence of Chiari malformations and sickle cell disease-a diagnostic dilemma: a report of 4 cases and review of literature.

The co-occurrence of sickle cell disease (SCD) and Chiari malformation (CM) poses clinical and diagnostic challenge since symptoms of both conditions may overlap. Although SCD and CM do not have a causal relationship, the overlapping neurologic symptoms may pose a diagnostic dilemma. To the best of our knowledge, the clinical manifestations and long-term consequence of CM in children with SCD has hitherto not been reported in the literature.

6-year-old girl with hydrocephalus.

With rare exceptions, pediatric tectal gliomas have been generally reported as low-grade tumors with relatively good prognosis. The patients are usually treated conservatively to manage the signs and symptoms of obstructive hydrocephalus. We report a case of a tectal glioma in a 6-years-old girl with histological features of anaplastic mixed oligoastrocytoma that continues to progress despite chemotherapy and radiation therapy.

Severe intrarenal fibrosis, infundibular stenosis, renal cysts, and persistent perilobar nephrogenic rests in a patient with Beckwith-Wiedemann syndrome 27 years after diffuse nephroblastomatosis and Wilms tumor: natural progression or a consequence of treatment?

A27-year-old woman presented with back and abdominal pain. She was diagnosed in infancy with Beckwith-Wiedemann syndrome and bilateral multifocal perilobar nephrogenic rests that progressed to diffuse nephroblastomatosis with neoplastic nephroblastomatous rests at 14 months of age and subsequently to a right Wilms tumor at 5 years of age. Computed tomography of the abdomen during the current admission showed multiple obstructed calices.