Laboratory Features and Pathology of Cytokine Storm Syndromes

Area of Science:

• Immunology
• Hematology
• Clinical Pathology

Background:

• Cytokine storm syndromes (CSSs), including hemophagocytic lymphohistiocytosis (HLH) and macrophage activation syndrome (MAS), pose significant diagnostic challenges in clinical practice.
• Routinely available laboratory tests for CSS diagnosis often lack specificity, complicating early and accurate identification.
• The underlying disease mechanisms of CSSs, especially in adult populations, remain incompletely understood.

Purpose of the Study:

• To review the pathogenesis of cytokine storm syndromes (CSSs).
• To detail the laboratory findings associated with CSSs.
• To outline recommended diagnostic strategies for CSSs, addressing current limitations.

Main Methods:

• Literature review focusing on pathogenesis, laboratory diagnostics, and clinical management of CSSs.
• Synthesis of information on hemophagocytic lymphohistiocytosis (HLH) and macrophage activation syndrome (MAS).
• Analysis of diagnostic criteria and laboratory test utility for CSS detection.

Main Results:

• Laboratory diagnosis of CSSs is challenging due to non-specific findings with standard tests.
• Confirmatory diagnostic testing for CSSs is not widely accessible in many regions, including the United States.
• Understanding of CSS pathogenesis, particularly in adults, is still evolving.

Conclusions:

• Effective laboratory diagnosis of CSSs requires a comprehensive approach, integrating clinical and evolving laboratory data.
• Improved diagnostic strategies are needed to overcome the limitations of current laboratory tests for CSSs.
• Further research into CSS pathogenesis is crucial for developing more specific diagnostic markers and targeted therapies.