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An anti-i biphasic hemolysin in chronic paroxysmal cold hemoglobinuria
Transfusion
|January 1, 1986
Summary
Paroxysmal cold hemoglobinuria (PCH) in an elderly patient with chronic lymphocytic leukemia was linked to an unusual anti-i antibody. This case highlights the necessity of the Donath-Landsteiner test for diagnosing PCH.
Area of Science:
- Hematology
- Immunology
- Serology
Background:
- Paroxysmal cold hemoglobinuria (PCH) is a rare autoimmune hemolytic anemia.
- PCH is typically associated with the Donath-Landsteiner antibody exhibiting anti-P specificity.
- Chronic lymphocytic leukemia (CLL) is a potential comorbidity in elderly patients.
Observation:
- An elderly patient with a history of CLL was diagnosed with PCH.
- The patient's Donath-Landsteiner antibody displayed anti-i specificity, which is uncommon.
- This finding deviates from the typical anti-P specificity observed in most PCH cases.
Findings:
- The identified biphasic hemolysin demonstrated specific anti-i reactivity.
- This case presents an atypical serological profile for PCH.
- The anti-i specificity of the Donath-Landsteiner antibody was confirmed.
Implications:
- This case underscores the importance of considering atypical antibody specificities in PCH diagnosis.
- Performing the Donath-Landsteiner test is crucial when PCH is suspected, regardless of typical serological findings.
- Further research into the association between CLL, PCH, and anti-i antibodies may be warranted.