Hemophagocytic lymphohistiocytosis in adults: A key issue in the COVID-19 era.

Hemophagocytic lymphohistiocytosis (HLH) is a syndrome characterized by persistent activation of the mononuclear phagocytic system, systemic inflammation, and hypercytokinaemia, which can lead to liver failure, "sepsis-like syndrome" and ultimately, to multiple organ failure and death. These disorders can be divided into primary and secondary (or reactive), the first, also known as familial HLH, is a genetic condition of childhood, which affects the function of TCD8 and NK cells, and usually presents in the first year of life. The secondary HLH affects mainly adults and adolescents and, it's more related to dysregulation of the immune system.

Sporotrichosis: A Clinicopathologic Study of 89 Consecutive Cases, Literature Review, and New Insights About Their Differential Diagnosis.

Background: Sporotrichosis is the most common and least severe of deep mycoses. This disease has varied clinic presentation as well as several differential diagnosis.

Methods: A cross-sectional and retrospective, individually based, observational study, based on records from the dermatopathology service of a university hospital in Brazil.