• Filipa Malheiro, Margarida Leitão do Nascimento, and Miguel BorregoLuísLServiço de Medicina Interna. Hospital da Luz. Lisboa; NOVA Medical School. Universidade NOVA de Lisboa. Lisboa. Portugal..
• Serviço de Medicina Interna. Hospital da Luz. Lisboa; NOVA Medical School. Universidade NOVA de Lisboa. Lisboa. Portugal.
• Acta Medica Port. 2024 Apr 1; 37 (4): 274279274-279.

IntroductionAcute pancreatitis is an acute inflammatory process of the pancreas with a high prevalence rate and varying degrees of severity that can be potentially life threatening. Much is still unknown about which mechanisms determine the course and severity of acute pancreatitis. The primary objective of this review is to identify the potential association between circulating B and T lymphocytes and the severity of acute pancreatitis. Subgroup analyses will be done according to the severity classification of the Revised Atlanta Classification System as well as according to the distinction between B lymphocytes and T lymphocytes and the severity of acute pancreatitis.MethodsA systematic search will be performed in Medline, Web of Science, EMBASE, Cochrane Central Register of Controlled trials and ClinicalTrials.gov. Three authors will independently do the selection process as well as data extraction that will be recorded into a flow diagram following the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P). The pathophysiology of acute pancreatitis is still not fully understood and its evolution is sometimes unpredictable. In this context, through this systematic review, the research team intends to determine what has been described about the role of serum lymphocytes in determining the severity of acute pancreatitis, by identifying a potential indicator of the severity of this acute disease.

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