Primary cold agglutinin disease: a case report.

Area of Science:

• Hematology
• Immunology
• Internal Medicine

Background:

• Cold agglutinin disease (CAD) is an autoimmune hemolytic anemia characterized by autoantibodies against red blood cells that activate at low temperatures.
• Primary CAD is diagnosed when no underlying or associated condition is identified, typically affecting the elderly population.
• The defining feature is the temperature-dependent reactivity of the autoantibody, which binds red cells poorly at 37°C but strongly at lower temperatures.

Observation:

• A case presentation of a patient experiencing severe pallor, jaundice, and reddish urine over a 10-year period.
• Symptoms were notably exacerbated during the winter season, consistent with temperature-dependent red blood cell destruction.
• The patient's presentation over a decade led to a diagnosis of primary cold agglutinin disease.

Findings:

• The patient was diagnosed with primary cold agglutinin disease based on clinical presentation and characteristic autoantibody behavior.
• The chronic nature of the condition, spanning 10 years, underscores the persistent challenges in managing CAD.
• Diagnostic criteria for primary CAD were met, excluding secondary causes.

Implications:

• This case emphasizes the importance of recognizing chronic cold agglutinin disease, even in the absence of apparent triggers.
• Conservative management strategies can be effective for long-term control of symptoms in primary CAD.
• Further research into the long-term effects and optimal conservative treatments for primary CAD is warranted.