Compatible transfusion therapy for paroxysmal cold hemoglobinuria

Area of Science:

• Pediatric Hematology
• Immunology
• Transfusion Medicine

Background:

• Paroxysmal cold hemoglobinuria (PCH) is a rare hemolytic anemia triggered by cold exposure.
• PCH is often associated with specific autoantibodies, such as cold-warm serum lysins with anti-Tja activity.

Purpose of the Study:

• To describe two pediatric cases of paroxysmal cold hemoglobinuria (PCH).
• To report the successful application of compatible transfusion therapy in managing PCH.
• To highlight the role of cold-warm serum lysins with anti-Tja activity in PCH.

Main Methods:

• Case report of two children diagnosed with PCH.
• Identification of cold-warm serum lysins with anti-Tja activity in both patients.
• Administration of compatible frozen-thawed red blood cell transfusions during the acute hemolytic phase.

Main Results:

• Both children presented with PCH associated with cold-warm serum lysins exhibiting anti-Tja activity.
• Transfusion with compatible frozen-thawed red blood cells successfully managed the acute hemolytic crisis in both cases.
• This represents the first documented instance of successful compatible transfusion therapy for PCH.

Conclusions:

• Compatible frozen-thawed red blood cell transfusion is an effective therapeutic strategy for managing acute hemolytic episodes in PCH.
• The findings underscore the importance of identifying specific autoantibody activity in PCH for guiding transfusion decisions.
• This study provides critical evidence for the successful use of transfusion support in PCH patients.